CN1052942C - Method for producing of plastic tube and arrangement carrying out same - Google Patents
Method for producing of plastic tube and arrangement carrying out same Download PDFInfo
- Publication number
- CN1052942C CN1052942C CN93103408A CN93103408A CN1052942C CN 1052942 C CN1052942 C CN 1052942C CN 93103408 A CN93103408 A CN 93103408A CN 93103408 A CN93103408 A CN 93103408A CN 1052942 C CN1052942 C CN 1052942C
- Authority
- CN
- China
- Prior art keywords
- centrifugal cylinder
- liquid thermosetting
- thermosetting resin
- cylinder
- temperature
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000004033 plastic Substances 0.000 title abstract description 17
- 229920003023 plastic Polymers 0.000 title abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 37
- 229920005989 resin Polymers 0.000 claims abstract description 33
- 239000011347 resin Substances 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000007921 spray Substances 0.000 claims abstract description 10
- 239000003365 glass fiber Substances 0.000 claims abstract description 6
- 239000003054 catalyst Substances 0.000 claims abstract description 5
- 239000004576 sand Substances 0.000 claims abstract description 5
- 238000009750 centrifugal casting Methods 0.000 claims description 6
- 238000009987 spinning Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000007664 blowing Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 208000002193 Pain Diseases 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000036407 pain Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Moulding By Coating Moulds (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention relates to a method for manufacturing a plastic pipe by adding liquid resin, catalysts, sand and glass fiber into a centrifugal cylinder as a section mould. The the prior art starts a thermosetting reaction by blowing hot air towards the cylinder, which results in environment pollution. The present invention has the improved method that heat quantity required by starting the thermosetting reaction does not blow hot air towards the cylinder but utilizes hot water transmitted through a hot water pipeline to be sprayed outside the centrifugal cylinder. After the exothermic thermosetting reaction starts, the cylinder rises to the initial temperature again because of the heat quantity released by the exothermic reaction. The cylinder can be further cooled by a cold water pipeline which can be selectively switched on to spray the centrifugal cylinder.
Description
The present invention relates to make the centre spinning method of pipe.
Is well-known at the horizontal axis that has that rotates as making plastic tube with thermosetting plastics in the centrifugal cylinder of metal of pattern, and thermosetting plastics can comprise inserts, for example polyester or the epoxy resin that mixes with calcium carbonate, sand and glass fibre.In such device, utilize the bar that moves back and forth in centrifugal cylinder that raw material is evenly distributed, and according to the predetermined purposes and the structure of size shaping tube wall as required.Though thermosetting reaction is a kind of exothermic process, but, after the raw material that with temperature is room temperature for the first time joins the centrifugal cylinder that temperature also is a room temperature, heat in order to guarantee that this process correctly and in the intended manner carries out, this is not only practical, and is essential.The general practice is hot-air to be blown in the centrifugal cylinder go.Therefore the air that blows out from centrifugal cylinder will be taken away gaseous solvent from liquid resin or catalyst, according to new environmental survey result and article, need purify with the air of purifier to this discharge.
The centre spinning method of manufacturing pipe of the present invention is used for addressing this problem.In the present invention, not to purify the air that blows out, but propose a kind of method,, be not blown into air fully, thereby just do not have the air of discharge yet according to this method.Another advantage is, heat can reclaim, thereby the energy that before had been used for adding hot-air can save.
For this reason, the invention provides a kind of centre spinning method of making pipe, it may further comprise the steps:
Centrifugal cylinder as the rotation pattern is provided;
The first liquid thermosetting resin is introduced described centrifugal cylinder, so that form the outermost wall part of described pipe by centrifugal casting, the described first liquid thermosetting resin has a gel time;
The second liquid thermosetting resin is introduced described centrifugal cylinder, so that form described tube inner wall part by centrifugal casting, the described second liquid thermosetting resin has a gel time longer than the gel time of the described first liquid thermosetting resin,
During the centrifugal casting of described pipe, the outer surface that is higher than the described centrifugal cylinder of heat water-spraying of described centrifugal cylinder temperature with temperature, so that heat described centrifugal cylinder, and promote the thermoset processes of described first and second thermosetting resins to make it become exothermic process;
When described thermoset processes becomes exothermic process, stop described spray; With
After described thermoset processes has become exothermic process, when the temperature of described centrifugal cylinder begins to reduce, the cold water that is lower than described centrifugal cylinder temperature with temperature sprays described centrifugal cylinder, and the spray of described cold water on described centrifugal cylinder causes a part of described cold water evaporation.
Embodiments of the invention are described with reference to the accompanying drawings.
Fig. 1 illustrates the principle schematic of the device of realizing the inventive method in the accompanying drawings;
Fig. 2 illustrates the schematic front view that centrifugal cylinder amplifies;
Fig. 3 illustrates the side view of nozzle;
Fig. 4 illustrates the front view of nozzle.
In device shown in Figure 1, the utilized motor with six axial levels drives the centrifugal cylinder of metal that rotates, and these cylinders only schematically illustrate in the drawings, and represent with numbering 1 to 6.Though these cylinders can have diverse diameter, for simplicity, they all are represented as and have identical size in the drawings.For the purpose of clear more, the bearing and the driver part of the complexity of these cylinders that on figure, do not draw, driver part is an infinite variable speed motor.
Can know the outer cover of seeing on each cylinder from Fig. 2, the centrifugal cylinder of outer cover complete closed, and the outer cover of cylinder 6 is designated by numeral 16.Can know also from Fig. 2 and to see that this outer cover can be made of the one section fluid-tight scrim 18 of support on 5 bearing rail strips 17.What be configured in this outer cover top is two showers 26 that shower nozzle 26a is housed, and they constitute sprinkling equipment together and are connected with inlet duct 28 by common valve 27.As shown in Figure 3 and Figure 4, these nozzles 26 design in a well-known manner, make them can produce injection stream 26b, and this injection stream 26b in one plane launches basically.Nozzle arrangement must make the plane of injection stream extend along the axis 10 that is parallel to this centrifugal cylinder 6.Inlet duct 28 is connected with cold water water supply line 36 by electrically operated valve 35, and is connected with hot water feeding pipe road 38 by electrically operated valve 37.The capacity of the sprinkling equipment of being made up of shower nozzle, water supply line and pump is to make that it can be according to diameter per minute spray 250 to 400 premium on currency of plastic tube.The lower part of outer cover 16 is 16c, plays a part to be used to reclaim the reclaimer of the water that flows through cylinder 6.Recycle-water equipment is connected with cold water recovery channel 31 by the pipeline 30 of banishing that electrically operated valve 29 is housed, and is connected with hot water recovery channel 34 by the pipeline 33 of banishing that electrically operated valve 32 is housed.
Each cylinder of other five centrifugal cylinders 1 to 5 is all installed sprinkling equipment and recycle-water equipment in the same manner, and be connected with cold water recovery channel 31, hot water recovery channel 34, cold water feed pipe 36 and hot water feeding pipe 38, therefore there is no need to further specify these parts shown in the drawings.
The cold water recovery channel is switched to first cold rinse bank 39, the drainpipe 42 that this cold rinse bank is equipped with overflow pipe 40 and can utilizes valve 41 to close.The pipe 44 that pump 43 is housed is connected to second cold rinse bank 45 bigger than first cold rinse bank 39 from first cold rinse bank 39.The drainpipe 48 that this cold rinse bank also is equipped with overflow pipe 46 and can utilizes valve 47 to close.The second bigger cold rinse bank 45 is connected with cold water feed pipe 36 by pump 49.Make all above-mentioned tanks, pump and pipeline constitute the cold water pipeline, sprinkling equipment and recycle-water equipment can be connected on this cold water pipeline by corresponding valve 29 and 35.
In addition, also has similar hot water line.Hot water recovery channel 34 is switched to first hot water storgae 50, the drainpipe 52 that this hot water storgae 50 is equipped with overflow pipe 51 and can utilizes valve 52 to close.The pipe 55 that pump 54 is housed is connected to second hot water storgae 56 bigger than first hot water storgae 50 from this first hot water storgae 50.The drainpipe 59 that second hot water storgae 56 also is equipped with overflow pipe 57 and can utilizes valve 58 to close.The second bigger hot water storgae 56 is connected with hot water feeding pipe 38 with heat exchanger 61 by pump 60, make two above-mentioned grooves, two pumps and corresponding pipeline constitute the hot water line, sprinkling equipment and recycle-water equipment can be connected on this hot water line by corresponding valve 32 and 37.
With regard to needs, can utilize any method that heat is supplied with heat exchanger 61, for example can adopt hot water or deep fat.Yet also electrical bar can be installed in heat exchange.
When the cold water spray is on scorching hot rotation pattern, just the space between pattern 6 and outer cover 16 produces water vapour, in order to take water vapour away from this space, exhaust tube 20 also is housed, this exhaust tube can be closed with valve 19, and is connected on the main exhaust tube 22 that fan 21 is housed, and this fan is extracted into steam in the atmosphere, certainly, steam is condensate in the condenser and also is fine.
Various other auxiliary equipment and tube connector shown in the drawings, in them some are to be used for supplying water to two pipelines, perhaps completely or partially it is ejected, it is communicated with each other, other is to be used for the pipeline of short circuit through sprinkling equipment and recycle-water equipment.
Certainly, not only all electrically operated valves are connected to center program control device 62 (only schematically illustrating in the accompanying drawing) by control line (not shown in the accompanying drawing), and all temps sensor and also be connected on the program-controlled equipment by corresponding lead at the level sensor on the tank, make and can read measured value from above.Circuit is design like this, makes that circuit or alarm signal can be triggered when not reaching critical value or surpassing critical value.In addition, the controller that drives centrifugal cylinder also is connected on the program-controlled equipment with the controller that supplies raw material, and makes available program-controlled equipment come control device.Can adopt so-called " manually " control according to specific requirement, also can control according to preset program.
In the method for manufacturing plastic tube of the present invention, according to well-known prescription, promptly according to the component of the requirement of plastic tube wall to be made, to comprise for example resin, corresponding catalyst, sand and the glass fibre of calcium carbonate additive, part successively, part side by side joins in the centrifugal cylinder of rotation, thereby makes the plastic tube of manufacturing reach smooth outer surface.Beginning only adds resin and catalyst, and then adds glass fibre and sand, makes them be penetrated in the plastics at least in part and goes, and normal situation is to form some structures that interconnect layer.
In order to begin or accelerate at room temperature to join the thermosetting reaction of the plastics in the centrifugal cylinder that temperature also is a room temperature, custom is that scorching hot air is blown in the centrifugal cylinder in the past.
Method of the present invention according to above-mentioned device then is not like this, but relevant circulating pump 51 and 60 is connected in the corresponding valve 32 of breakdown and 37, with sprinkling equipment and recycle-water equipment and hot water line's connection.Utilize the hot water of 70 ℃ of temperature for example, make its outside that sprays centrifugal cylinder 6 and along it toward dirty, thereby make this cylinder in about 90 seconds time, be heated to for example 60 °-70 ℃ temperature from 20 ℃.Because cylinder is to use metal, normally use iron work, so thermal conductivity is fine, heat has sent plastics to.In order to prevent that the outer layer segment of resin becomes too mobile before gel, make glass fibre owing to moving of it high concentration that becomes, hinder thermosetting, should use this resin for the outermost wall of plastic tube part, the gel time of this resin only is 10% to 70% of the used resin gel time of inwall.When 20 ℃ pattern temperature, this resin has 3 minutes gel time, and when 30 ℃ pattern temperature, gel time is 5 minutes, and the gel time of the used resin in middle level is three times big, and the gel time of inner layer resin is that 4-5 is doubly big.Utilization is than the inhibitor of small scale or add a large amount of accelerators and can reach this point.Because the heat release thermoset processes that begins after gel, resin is heated to 80 °-120 °, thereby how many centrifugal cylinders is also heated.One becomes exothermic process when the thermosetting process, promptly greatly when the material that constitutes the moulding plastics pipe reaches about 70 ℃ temperature, perhaps more after a while, just closes corresponding valve 37 and 32, and sprinkling equipment and recycle-water equipment are separated with the hot water line.When the temperature that is produced on plastic tube by the heat release thermoset processes descends again, the valve 35 and 29 that breakdown is other, with water temperature between 15 ° to 40 ° for example 20 ℃ cold water pipeline be connected to sprinkling equipment and recycle-water equipment, also connect circulating pump 43 and 49 certainly, cool off.During cooling, cooling water is heated to about 50 ℃ temperature at first, and the part cooling water is evaporated, thereby has discharged the heat on the pattern.Utilize this cooling means, depend on the temperature of cold water, centrifugal cylinder just is cooled to temperature between 50 ℃ to 20 ℃ in 5-10 minute time.
When the constitutive material of the plastic tube of needs has added and resin when having solidified, the gas that need not go to great pains just can be pulled out plastic tube from centrifugal cylinder, this is owing to adopt new heating and cooling mode, the internal diameter of centrifugal cylinder is a bit larger tham the external diameter of the plastic tube of sclerosis, and, be constant along the length temperature of whole centrifugal cylinder and plastic tube.Another significant advantage is, the heat that produces during the thermoset processes of heat release can be used for starting the thermosetting process of next root pipe, has used heat pump for this reason, and this pump will be delivered to hot water storgae 56 from the heat of cold rinse bank 45, but for the purpose of clearer, not shown in the accompanying drawings this pump.If need not any heat pump, then essential with the water of heat exchanger 61 heating in the hot water line, according to the insulation situation of hot water line's upper flume, not only after long operation pauses, to heat, and also will heat in all the other times.It is cold that water in the cold water pipeline must keep.Perhaps must make its cooling, for example utilize cooling device based on the water evaporating principle with any known method.
With available the 3rd advantage of new method is not have environmental pollution.In addition, the cost problem can not be ignored, be used to add the energy of hot-air in the past greater than the energy that is used to operate two circulating pumps on the supply channel now, and the cost of installation supply channel is also within the cost that hot-air generator and fan are installed, in a word, although it is not nonsensical reducing running cost, environmental benefit is significantly improved.
Claims (6)
1. centre spinning method of making pipe, it may further comprise the steps:
Centrifugal cylinder as the rotation pattern is provided;
The first liquid thermosetting resin is introduced described centrifugal cylinder, so that form the outermost wall part of described pipe by centrifugal casting, the described first liquid thermosetting resin has a gel time;
The second liquid thermosetting resin is introduced described centrifugal cylinder, so that form described tube inner wall part by centrifugal casting, the described second liquid thermosetting resin has a gel time longer than the gel time of the described first liquid thermosetting resin,
During the centrifugal casting of described pipe, the outer surface that is higher than the described centrifugal cylinder of heat water-spraying of described centrifugal cylinder temperature with temperature, so that heat described centrifugal cylinder, and promote the thermoset processes of described first and second thermosetting resins to make it become exothermic process;
When described thermoset processes becomes exothermic process, stop described spray; With
After described thermoset processes has become exothermic process, when the temperature of described centrifugal cylinder begins to reduce, the cold water that is lower than described centrifugal cylinder temperature with temperature sprays described centrifugal cylinder, and the spray of described cold water on described centrifugal cylinder causes a part of described cold water evaporation.
2. method according to claim 1 is characterized in that, the gel time of the described first liquid thermosetting resin be the described second liquid thermosetting resin gel time 10% to 70%.
3. method according to claim 1 and 2 is characterized in that, the described first and second liquid thermosetting resins respectively include glass fibre.
4. method according to claim 1 and 2 is characterized in that, the described first and second liquid thermosetting resins respectively comprise a kind of inserts, a kind of suitable catalyst and sand.
5. method according to claim 1 and 2 is characterized in that, described centrifugal cylinder is a metal.
6. method according to claim 1 and 2, it is characterized in that, before introducing the described first liquid thermosetting resin and introducing the step of the described second liquid thermosetting resin, the described first liquid thermosetting resin, the described second liquid thermosetting resin and described centrifugal cylinder all are in room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93103408A CN1052942C (en) | 1993-04-03 | 1993-04-03 | Method for producing of plastic tube and arrangement carrying out same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93103408A CN1052942C (en) | 1993-04-03 | 1993-04-03 | Method for producing of plastic tube and arrangement carrying out same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1093315A CN1093315A (en) | 1994-10-12 |
| CN1052942C true CN1052942C (en) | 2000-05-31 |
Family
ID=4984645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93103408A Expired - Fee Related CN1052942C (en) | 1993-04-03 | 1993-04-03 | Method for producing of plastic tube and arrangement carrying out same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1052942C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103057023B (en) * | 2013-01-21 | 2015-03-04 | 中国科学技术大学 | Improvement method for centrifugal casting silicon tube |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2278858A (en) * | 1939-09-09 | 1942-04-07 | Du Pont | Apparatus for the preparation of cast resins |
| US2826869A (en) * | 1954-03-27 | 1958-03-18 | Glasund Spiegel Manufacture Ac | Method and apparatus for producing tubes of vitreous materials |
| US3234315A (en) * | 1962-03-09 | 1966-02-08 | Blue | Rotational method for casting hollow bodies including spraying of a liquid heat transfer medium |
-
1993
- 1993-04-03 CN CN93103408A patent/CN1052942C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2278858A (en) * | 1939-09-09 | 1942-04-07 | Du Pont | Apparatus for the preparation of cast resins |
| US2826869A (en) * | 1954-03-27 | 1958-03-18 | Glasund Spiegel Manufacture Ac | Method and apparatus for producing tubes of vitreous materials |
| US3234315A (en) * | 1962-03-09 | 1966-02-08 | Blue | Rotational method for casting hollow bodies including spraying of a liquid heat transfer medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1093315A (en) | 1994-10-12 |
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