CN101344199B - Rotational molding plastic composite pipes with steel rings and manufacturing method thereof - Google Patents
Rotational molding plastic composite pipes with steel rings and manufacturing method thereof Download PDFInfo
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- CN101344199B CN101344199B CN2008100701256A CN200810070125A CN101344199B CN 101344199 B CN101344199 B CN 101344199B CN 2008100701256 A CN2008100701256 A CN 2008100701256A CN 200810070125 A CN200810070125 A CN 200810070125A CN 101344199 B CN101344199 B CN 101344199B
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Abstract
The invention discloses a rotational molding steel ring plastic composite pipe material and a manufacturing method thereof; the wave crest of a sylphon bellowss body (1) is packed with a steel ring (2); the manufacturing method is divided into the steps of mold (3) manufacture, coating mold release agent, steel ring surface treatment, raw material weight calculation, material filling and mold closing, rotating heating insulation, cooling, mold release, modification, inspection, finished products into warehouse, etc., so as to obtain the composite pipe material. The rotational molding steel ring plastic composite pipe material is combined with the steel ring; the plastic pipe body and the steel ring can be organically integrated into a whole, taking the advantage to make up for the deficiency so as to obtain double win, thereby not only meeting the needs of stiffness and strength of a large-caliber pipeline, but also meeting the needs of corrosion protection and service life prolonging, and manufacturing pipe material with arbitrary ring stiffness and diameter; the rotational molding steel ring plastic composite pipe material has small production equipment investment, easy equipment maintenance, high raw material using rate and almost no waste generation, reaches organic unification of pipe material cost and rigidity, and manufactures a buried pipe material with appropriate cost, arbitrary large caliber, self-taking mouthing and mouthing socket connection.
Description
Technical field
The invention belongs to the plastic tube in industry and civil engineering field, specifically, relate to a kind of composite corrugated tubing of large-bore plastics and manufacture method thereof of passing through the band steel ring of rotationally molding.
Background technique
Because the underground pipe material mainly bears the external pressure load, thereby ring stiffness is had higher requirements, and ring stiffness is directly proportional with the moment of inertia of tube wall and the Young's modulus of constituent material; Reach same ring stiffness, structured wall popes can be than the solid wall pipe 30%-70% that saves material, and according to the data introduction, the former can reach DN2400mm at the caliber maximum, and so the domestic DN1200mm that reaches of the latter is utilization structure wall pipe usually.Bury ground plastic construction wall pipe and be divided into list/double-wall corrugated pipe, riffled tube and entwining tube three major types.The ground structure wall pipe that buries of current trend has PVC-U list/double-wall corrugated pipe, PVC-U radially riffled tube, polyethylene double-wall corrugated pipe, polyethylene spirally enwound structure-wall pipe, steel band enhanced polyethylene (PE) helical bellows, glass reinforced plastic sand pipe (GRP) etc.PVC-U double-wall corrugated pipe main specifications is DN160-500mm, PVC-U radially riffled tube main specifications is DN110-500mm, PE double-wall corrugated pipe main specifications is DN225-800mm, be up to 1500mm, steel band enhanced polyethylene (PE) helical bellows DN600-2000mm, the GRP main specifications is DN800-1400mm.These structured wall popes consumption maximums be medium-small diameter scope (about below 1 meter), mainly use double-wall corrugated pipe.Wherein PVC-U double-wall corrugated pipe and riffled tube are useful in 500 millimeters following scopes of diameter, and HDPE double-wall corrugated pipe application diameter is at 1000 millimeters following scopes and cold area.In the scope of diameter, mainly use steel band enhanced polyethylene (PE) helical bellows or glass reinforced plastic sand pipe greater than 1 meter.The winding screw pipe that metal strengthens in the winding screw pipe,
The edge ring stiffness is bigger, saves with material, so its development space is bigger; Yet Wrapping formed tubing is because the not high multiple reason of utilization ratio of material is less competitive than double-wall corrugated pipe below the 800mm, and the above caliber of 800mm is less competitive than a carat pipe.Above-mentioned plastic underground tubing ubiquity manufacturing mechanism and is dropped into expense height, manufacture control complexity, and tubing cost and ring stiffness do not reach organic unification.Particularly large diameter underground pipe is all the more so.
Summary of the invention
For solving above technical problem, one of purpose of the present invention is to provide a kind of plastic tube body and steel ring can organically combine bigbore rotational molding plastic composite pipes with steel rings.
Two of purpose of the present invention is to provide a kind of method of utilizing the manufacturing rotational molding plastic composite pipes with steel rings that common rotomoulding apparatus can both make.
Technological scheme of the present invention is as follows: a kind of rotational molding plastic composite pipes with steel rings, comprise the bellows body, its key is: be enclosed with steel ring in the crest of described bellows body, described steel ring is hollow square steel or hollow round steel or " worker " word steel or solid just semicircle; Described bellows body one end is provided with the bellmouth that rotationally molding is an one.Be convenient to install and connect.Above-mentioned steel ring and bellows body central lines.For one by one independently steel ring along the bellows body shaft to even distribution, the composite pipe intensity of comparing the steel ring of coiled coil is greatly enhanced.
A kind of manufacture method of rotational molding plastic composite pipes with steel rings, form by following steps:
(1) make mould, described mould one end is provided with the upper and lower mould that adapts with bellmouth; The siphunculus inner chamber that forms at the upper die and lower die of mould rotational moulding bellows body is provided with the groove of annular, and this groove is distributed in dies cavity vertically;
(2) be coated with full releasing agent at mould inner surface; Coating release agent be convenient to take out product and when preventing to heat plastic raw material or melt and mould inner surface because the effect of surface oxidising can chemistry take place or physics is bonding.The releasing agent major requirement possesses resistance to heat.
(3) steel ring is carried out surface treatment, locating pin is set in the external diameter surface and the both sides of steel ring; The one, in order to allow steel ring in the groove of upper and lower mould, locate; The 2nd, allow and leave the gap between the cell wall of groove of steel ring outer surface and both sides and counterdie, plastics can all be wrapped steel ring outer surface and both sides, allowing steel ring and plastic tube reach real combination is one; The 3rd, the bonding strength between reinforced plastic and the steel ring.The steel ring material can adopt hollowly as hollow square steel (comprising square) or round steel in make producing, and also adopts solidly in I-steel, channel-section steel, semicircle steel etc., and material comprises various materials and length, thick size simultaneously.The tubing once-through does not need welding, the weldless trace.Rotationally molding can carry bellmouth steel ring reinforced plastic composite pipe.
(4) calculate plastic tube tube wall volume v=[π r according to formula
2L-π (r-h)
2L] * k
The external diameter of the r-bellows body mouth of pipe wherein; The length of L-bellows body and bellmouth one;
The thickness of tube wall between two crests on the h-bellows body;
The k-correction factor is decided according to the specification and the consumption of used steel ring, and k generally gets 1.1～1.5;
Density p=930kg/m with plastic tube
3
Calculate the weight M of the raw material of the manufacturing plastic tube that adds mould by ρ .v=M; The weight of adding in practical operation can be suitably more than amount of calculation, guarantee that plastic tube thickness can reach the steel ring internal surface is wrapped up fully.
(5) steel ring is embedded in the groove of counterdie, then the raw material of step 4 calculating gained weight manufacturing plastic tube is poured in the counterdie, cover patrix, two ends are sealed by capping; The plastic materials of described manufacturing composite pipe is that mass ratio 1: 1～3 fineness are 12～30 orders and two kinds of particles of 35～50 purposes through grinding disposing; Different fineness makes the density of plastic composite pipe and intensity all better, and whole surface finishment and smoothness are all better.
(6) entire die is placed on the rotational moulding machine, is rotated, waves simultaneously with 180 ℃～220 ℃ temperature mould evenly to be heated 3～4 hours; Make plastic molting be covered with the inwall of entire die.
(7) cooling die, mould continues rotation, waves, and naturally cools to room temperature; Allow the plastics after the fusing cover the inwall of mould uniformly, slowly to reach pipe thickness even for cooling forming, and natural cooling just can obtain the plastic tube of higher density simultaneously.
(8) demoulding is taken out the plastic tube of in-mold molding and is obtained rotational molding plastic composite pipes with steel rings.
The rotational molding plastic composite pipes with steel rings that takes out after the demoulding also needs end face is modified, and after check, finished product is put in storage.
The material of making plastic tube is the waste polyethylene of LDPE or LLDPE or HDPE or recovery.Material also can be some common materials of making plastic tube, as PP, PVC, ABS, polyester, nylon, epoxy resin and other flowability plastic materials preferably, for some other demands also can inside be added as mineral fillers such as glass fibre, carbon fibers.
Above-mentioned rotational moulding machine is tower type rotational moulding machine or swing rotational moulding machine or wears comb formula rotational moulding machine.
Following table 1 is by being produced the tubing main performance index:
Beneficial effect: rotational molding plastic composite pipes with steel rings of the present invention combines with the steel ring enhancing, plastic tube body and steel ring can organically combine and be one, learn from other's strong points to offset one's weaknesses, bring out the best in each other, can satisfy the needs of required rigidity of large diameter pipeline and intensity, also satisfy needs anticorrosion and that increase the service life, can make the tubing of any ring stiffness and diameter; The manufacturing mechanism less investment, device maintenance is convenient, and the utilization rate of raw materials height does not almost have waste product and produces, and has reached the organic unity of tubing cost and rigidity, produces the suitable any heavy caliber of cost, can carry bellmouth and can carry out the underground pipe material that socket joint connects.
Description of drawings
Fig. 1 is the structural representation of rotational molding plastic composite pipes with steel rings of the present invention;
Fig. 2 is the partial enlarged drawing of embodiment's 1 rotational molding plastic composite pipes with steel rings;
Fig. 3 is the partial enlarged drawing of embodiment's 2 rotational molding plastic composite pipes with steel rings;
Fig. 4 is the partial enlarged drawing of embodiment's 3 rotational molding plastic composite pipes with steel rings;
Fig. 5 is the partial enlarged drawing of embodiment's 4 rotational molding plastic composite pipes with steel rings;
Fig. 6 is the partial enlarged drawing of embodiment's 5 rotational molding plastic composite pipes with steel rings;
Fig. 7 is the structural representation of mould of the present invention;
Fig. 8 is the partial enlarged drawing of Fig. 7.
Embodiment
As shown in Figure 1 and Figure 2, rotational molding plastic composite pipes with steel rings is enclosed with steel ring 2 in the crest of described bellows body 1.Steel ring 2 and bellows body 1 central lines, steel ring adopts hollow square steel to be processed into.Bellows body 1 one ends are provided with bellmouth 1a.
The manufacture method of rotational molding plastic composite pipes with steel rings, form by following steps:
(1) make mould 3, (referring to Fig. 7, Fig. 8) is provided with annular groove 3a at the inner chamber of the siphunculus that upper die and lower die form; Mould 3 one ends also are provided with the upper and lower mould that adapts with bellmouth 1a.
(2) be coated with full releasing agent at mould inner surface;
(3) steel ring is carried out surface treatment, locating pin is set in the outer surface and the both sides of steel ring;
(4) calculate plastic tube tube wall volume v=[π r according to formula
2L-π (r-h)
2L] * k
The external diameter of r-bellows body 1 mouth of pipe wherein; The length of L-bellows body 1 and bellmouth 1a one;
The thickness of tube wall between two crests on the h-bellows body 1;
The k-correction factor is decided according to the specification and the consumption of used steel ring, and k generally gets 1.1～1.5;
Density p=930kg/m with plastic tube
3
Calculate the weight M of the raw material of the manufacturing plastic tube that adds mould 3 by ρ .v=M;
(5) steel ring is embedded in the groove 3a of counterdie, then the raw material LDPE of step 4 calculating gained weight manufacturing plastic tube is poured in the counterdie, cover patrix, two ends are sealed by capping;
(6) entire die 3 is placed on the tower type rotational moulding machine, is rotated, waves simultaneously with 180 ℃～220 ℃ temperature mould 3 evenly to be heated 3～4 hours;
(7) cooling die 3, and mould 3 continues rotation, waves, and naturally cools to room temperature;
(8) demoulding is taken out the plastic tube of moulding in the mould 3 and is obtained rotational molding plastic composite pipes with steel rings.The rotational molding plastic composite pipes with steel rings that takes out after the demoulding also also needs end face is modified, and after check, finished product is put in storage.
As Fig. 1, shown in Figure 3, the rotational molding plastic composite pipes with steel rings steel ring adopts the open circles steel to make, and all the other structures are all identical with embodiment 1.
The manufacture method of rotational molding plastic composite pipes with steel rings, form by following steps:
(1) make mould 3, (referring to Fig. 7, Fig. 8) is provided with annular groove 3a at the inner chamber of the siphunculus that upper die and lower die form;
(2) be coated with full releasing agent at mould 3 internal surfaces;
(3) steel ring is carried out surface treatment, locating pin is set in the outer surface and the both sides of steel ring;
(4) calculate plastic tube tube wall volume v=[π r according to formula
2L-π (r-h)
2L] * k
The external diameter of r-bellows body 1 mouth of pipe wherein; The length of L-bellows body 1 and bellmouth 1a one;
The thickness of tube wall between two crests on the h-bellows body 1;
The k-correction factor is decided according to the specification and the consumption of used steel ring, and k generally gets 1.1～1.5; Density p=930kg/m with plastic tube
3
Calculate the weight M of the raw material of the manufacturing plastic tube that adds mould 3 by ρ .v=M;
(5) steel ring is embedded in the groove 3a of counterdie, then step 4 is calculated the raw material LLDPE that gained weight is made plastic tube, LLDPE is that 1: 1 fineness of mass ratio is that 12 orders and 35 purpose particles are poured in the counterdie through grinding disposing, covers patrix, and two ends are sealed by capping;
(6) entire die 3 is placed on the swing rotational moulding machine, is rotated, waves simultaneously with 200 ℃ of temperature mould 3 to be heated 3.5 hours;
(7) cooling die 3, and mould 3 continues rotation, waves, and naturally cools to room temperature;
(8) demoulding is taken out the plastic tube of moulding in the mould 3 and is obtained rotational molding plastic composite pipes with steel rings.The rotational molding plastic composite pipes with steel rings that takes out after the demoulding also needs end face is modified, and after check, finished product is put in storage.
Embodiment 3
As Fig. 1, shown in Figure 4, the rotational molding plastic composite pipes with steel rings steel ring adopts " worker " word steel to make, and does not have the structure of bellmouth, and all the other structures are all identical with embodiment 1.
The manufacture method of rotational molding plastic composite pipes with steel rings, form by following steps:
(1) make mould 3, (referring to Fig. 7, Fig. 8) is provided with annular groove 3a at the inner chamber of the siphunculus that upper die and lower die form;
(2) be coated with full releasing agent at mould 3 internal surfaces;
(3) steel ring is carried out surface treatment, locating pin is set in the outer surface and the both sides of steel ring;
(4) calculate plastic tube tube wall volume v=[π r according to formula
2L-π (r-h)
2L] * k
The external diameter of r-bellows body 1 mouth of pipe wherein; The length of L-bellows body 1 and bellmouth 1a one;
The thickness of tube wall between two crests on the h-bellows body 1;
The k-correction factor is decided according to the specification and the consumption of used steel ring, and k generally gets 1.1～1.5;
Density p=930kg/m with plastic tube
3
Calculate the weight M of the raw material of the manufacturing plastic tube that adds mould 3 by ρ .v=M;
(5) steel ring is embedded in the groove 3a of counterdie, then step 4 is calculated the raw material HDPE that gained weight is made plastic tube, HDPE is that 1: 3 fineness of mass ratio is that 30 orders and 50 purpose particles are poured in the counterdie through grinding disposing, covers patrix, and two ends are sealed by capping;
(6) entire die 3 is placed on the swing rotational moulding machine, is rotated, waves simultaneously with 220 ℃ of temperature mould 3 to be heated 4 hours;
(7) cooling die 3, and mould 3 continues rotation, waves, and naturally cools to room temperature;
(8) demoulding is taken out the plastic tube of moulding in the mould 3 and is obtained rotational molding plastic composite pipes with steel rings.The rotational molding plastic composite pipes with steel rings that takes out after the demoulding also needs end face is modified, and after check, finished product is put in storage.
Embodiment 4
As Fig. 1, shown in Figure 5, the rotational molding plastic composite pipes with steel rings steel ring adopts channel-section steel to make, and all the other structures are all identical with embodiment 1.
The manufacture method of rotational molding plastic composite pipes with steel rings, the raw material of making plastic tube adopts the waste polyethylene that reclaims, and PE is that 1: 2 fineness of mass ratio is 20 orders and 40 purpose particles through grinding disposing, and all the other steps are all identical with embodiment 3 with parameter.
Embodiment 5
As Fig. 1, shown in Figure 6, the rotational molding plastic composite pipes with steel rings steel ring adopts semicircle just to make, and all the other structures are all identical with embodiment 1.
The manufacture method of rotational molding plastic composite pipes with steel rings, the raw material of making plastic tube adopts ABS, and ABS is that 1: 2 fineness of mass ratio is 20 orders and 40 purpose particles through grinding disposing, and all the other steps are all identical with embodiment 3 with parameter.
Claims (6)
1. the manufacture method of a rotational molding plastic composite pipes with steel rings is characterized in that being made up of following steps:
(1) make mould (3), described mould (3) one ends are provided with the upper and lower mould that adapts with bellmouth (1a); The siphunculus inner chamber that forms at the upper die and lower die of mould (3) rotational moulding bellows body (1) is provided with the groove (3a) of annular, and this groove (3a) is distributed in mould (3) inner chamber vertically;
(2) be coated with full releasing agent at mould (3) internal surface;
(3) steel ring is carried out surface treatment, locating pin is set in the external diameter surface and the both sides of steel ring;
(4) calculate plastic tube tube wall volume v=[π r according to formula
2L-π (r-h)
2L] * k
The external diameter of r-bellows body (1) mouth of pipe wherein; The length of L-bellows body (1) and bellmouth (1a) one;
The thickness of tube wall between last two crests of h-bellows body (1);
The k-correction factor is decided according to the specification and the consumption of used steel ring, and k gets 1.1～1.5;
Density p=930kg/m with plastic tube
3
Calculate the weight M that adds the raw material of manufacturing plastic tube in the mould (3) by ρ .v=M;
(5) steel ring is embedded in the groove (3a) of counterdie, then the raw material of step 4 calculating gained weight manufacturing plastic tube is poured in the counterdie, cover patrix, two ends are sealed by capping, and the material of described manufacturing plastic tube is that mass ratio 1: 1～3 fineness are 12～30 orders and two kinds of particles of 35～50 purposes through grinding disposing;
(6) entire die (3) is placed on the rotational moulding machine, is rotated, waves to use 180 ℃～220 ℃ temperature that mould (3) was evenly heated 3～4 hours simultaneously;
(7) cooling die (3), mould (3) continues rotation, waves, and naturally cools to room temperature;
(8) demoulding is taken out the plastic tube of the interior moulding of mould (3) and is obtained rotational molding plastic composite pipes with steel rings.
2. the manufacture method of rotational molding plastic composite pipes with steel rings according to claim 1 is characterized in that: the rotational molding plastic composite pipes with steel rings that takes out after the demoulding also needs modify end face, puts in storage through checking after.
3. the manufacture method of rotational molding plastic composite pipes with steel rings according to claim 1 is characterized in that: the material of making plastic tube is LDPE or HDPE.
4. the manufacture method of rotational molding plastic composite pipes with steel rings according to claim 1, it is characterized in that: described rotational moulding machine is tower type rotational moulding machine or swing rotational moulding machine or wears comb formula rotational moulding machine.
5. rotational molding plastic composite pipes with steel rings that makes according to the manufacture method of the described rotational molding plastic composite pipes with steel rings of claim 1, comprise bellows body (1), it is characterized in that: be enclosed with steel ring (2) in the crest of described bellows body (1), described steel ring (2) is hollow square steel or hollow round steel or " worker " word steel or solid semicircle steel; Described bellows body (1) one end is provided with the bellmouth that rotationally molding is an one (1a).
6. rotational molding plastic composite pipes with steel rings according to claim 5 is characterized in that: described steel ring (2) and bellows body (1) central lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100701256A CN101344199B (en) | 2008-08-15 | 2008-08-15 | Rotational molding plastic composite pipes with steel rings and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100701256A CN101344199B (en) | 2008-08-15 | 2008-08-15 | Rotational molding plastic composite pipes with steel rings and manufacturing method thereof |
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| CN101344199A CN101344199A (en) | 2009-01-14 |
| CN101344199B true CN101344199B (en) | 2010-10-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102107481B (en) * | 2010-12-10 | 2013-07-10 | 刘军 | Method for controlling dimensional precision of rotational molding formed hollow products |
| CN103192479B (en) * | 2012-01-05 | 2016-05-25 | 应革 | One-shot forming is the method at interior plastics car housing containing chassis |
| CN102606813A (en) * | 2012-03-15 | 2012-07-25 | 赵炳泉 | Hollow-wall steel-plastic composite winding pipe and manufacturing method thereof |
| CN103899851A (en) * | 2013-12-20 | 2014-07-02 | 卢希然 | Novel glass fiber reinforced plastic composite pipe |
| CN104723579B (en) * | 2015-04-13 | 2017-03-22 | 哈尔滨工业大学 | Assembling mold for all-composite corrugated sandwich cylindrical shells |
| CN118477808A (en) * | 2024-07-12 | 2024-08-13 | 连云港港诚滚塑科技有限公司 | Steel lining plastic rotational molding preparation process and rotational molding machine for preparation |
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