CN100380040C - Coextruding heat winding structure wall pipe, processing method and method - Google Patents
Coextruding heat winding structure wall pipe, processing method and method Download PDFInfo
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- CN100380040C CN100380040C CNB2005100127516A CN200510012751A CN100380040C CN 100380040 C CN100380040 C CN 100380040C CN B2005100127516 A CNB2005100127516 A CN B2005100127516A CN 200510012751 A CN200510012751 A CN 200510012751A CN 100380040 C CN100380040 C CN 100380040C
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Abstract
The present invention provides a double extruder co-extrusion heat winding structure wall pipe. A processing method and a forming mould are used for forming a new product structure and reducing the use quality of materials. According to an equivalent wall thickness theory, the ring rigidity of final products is increased. The co-extrusion heat winding structure wall pipe is a pipe with a large caliber and is formed by that a plastic belt is used as a basal layer and is stuck and formed through screw heat winding on a mould core pipe. The present invention is characterized in that the pipe wall of the pipe is a corrugated pipe with a single wall that the outer part of the plastic belt is heated, wound, stuck, co-extruded, wrapped and spread with same materials. The processing method of the present invention, polypropylene processed by the mould and a polyethylene co-extrusion PP pipe are adopted, the polypropylene is completely wrapped and spread on a polypropylene corrugated pipe with a single wall, strength is increased, and the present invention is suitable for being used as an enhancement rib of the pipe with the large caliber. For an extruder, extrusion quantity is certain. Because the materials are lightened, the production efficiency of the pipe is improved. At the same time, because a double-machine mode is used for production, and because one extruder is increased, the production speed of the pipe with the large caliber is improved greatly.
Description
Technical field
The present invention relates to a kind of coextruding heat winding structure wall pipe, processing method and mould belong to plastic tube processing technique and equipment technical field.
Background technique
At present; large-diameter plastic pipe belongs to chemical building material; be to mould Dai Gang,, to be applied to municipal drainage to mould update product for cement; remote low-pressure water delivery; mine and chemical industry draining, the making of irrigation and water conservancy irrigation and ventilation duct and pressure vessels for the chemical industry etc. are to saving the energy; reduce and pollute, the protection environment is significant.Unit (extruder) mode of production is generally adopted in this production of moulding pipe at present, the pipe of moulding that is used to twine skeleton is to extrude the coated polypropylene plastics pipe of U type circular arc band (being called for short the pp pipe) mode with mould to produce, do on the tubing of basic unit as stiffening rib by the online polyethylene flat rubber belting that is wrapped in, the tubing of Sheng Chaning has following defective in this way: 1, polyethylene can not be managed by complete coated pp sometimes, formation exposes, reduce the product ring stiffness, in order to guarantee its quality of product, flat rubber belting twines very thick that basic unit often designs; 2, coated pp pipe diameter is unsuitable excessive, is 54 millimeters to the maximum, and the size-constrained system of skeleton influences the product ring stiffness; 3, the same to the polythene material requirement with basic unit, the cost of production height.
Summary of the invention
The object of the present invention is to provide a kind of pair of extruder coextruding heat winding structure wall pipe, processing method and shaping die to form new product structure, reduce the material use amount, according to equivalent wall thickness principle, increase the ring stiffness of final products.
Technological scheme of the present invention is achieved in that this coextruding heat winding structure wall pipe, be that it is characterized in that: the tube wall of this tubing is the single-wall corrugated pipe that the plastic tape external heat is twined the coated same material of bonding co-extrusion by the heavy caliber pipe of plastic tape as basic unit's spiral heat winding molding bonded on the mold core pipe.
The tube wall that a kind of elongation technology scheme of the present invention is described coextruding heat winding structure wall pipe is that hollow and thin-walled rectangular tube spiral heat on the mold core pipe is twined molding bonded, and hollow and thin-walled rectangular tube outer wall heat is twined the single-wall corrugated pipe of the coated same material of bonding co-extrusion.
The processing method of described coextruding heat winding structure wall pipe, a kind of technological scheme is: adopt two parallel extruders, a polyethylene extrusion flat rubber belting is as basic unit; The coated poly single-wall corrugated pipe of another co-extrusion is as stiffening rib, and the online heat of spiral successively is wrapped on the mold core pipe of rotation and axial translation, the molding bonded heavy caliber pipe.
The processing method of described coextruding heat winding structure wall pipe, the elongation technology scheme is: an extruder is extruded the hollow and thin-walled rectangular tube and is twined as basic unit's spiral heat on the mold core pipe; The coated poly single-wall corrugated pipe of another co-extrusion is as stiffening rib, and the online heat of spiral successively is wrapped on the mold core pipe of rotation and axial translation, the molding bonded heavy caliber pipe.
In the hollow and thin-walled rectangular tube that described coextruding heat winding structure wall pipe processing method relates to 1-3 stiffening rib is set.
The hollow and thin-walled rectangular tube that described coextruding heat winding structure wall pipe processing method relates to twines the slit and is filled with the same material layer.
The processing mold of the coated polyethylene single-wall corrugated pipe of the co-extrusion of described coextruding heat winding structure wall pipe, its basic structure comprises the cross extruder head that is made of die holder, plug, detachable core rod and extrusion outlet, runner is characterized in that described runner is provided with ring release district, protruding center between plug and core rod.
The processing mold of the coated poly single-wall corrugated pipe of described co-extrusion, described detachable core rod and plug scyewed joint.
The processing mold of the coated poly single-wall corrugated pipe of described co-extrusion, release district, the protruding center of described ring is arranged between detachable core rod and the collecting plate.
The detachable core rod and the collecting plate front of the processing mold of the coated poly single-wall corrugated pipe of described co-extrusion are provided with a mouthful mould.
Adopt the polypropylene and the polyethylene co-extrusion pp pipe of processing method of the present invention and Mould Machining, the complete coated polypropylene single-wall corrugated pipe of polyethylene has increased intensity, and is most suitable as the strength bar of heavy caliber pipe.
This co-extrusion mode can make polyethylene and large diameter polypropylene single-wall corrugated pipe co-extrusion, produces large diameter pp cannon born frame, improves tubing ring stiffness (pipeline bears the ability of external load).Prior art pp pipe diameter is 21 millimeters, 34 millimeters, 42 millimeters, 54 millimeters, and the present invention increases diameter to 64 millimeter by changing core rod, 72 millimeters, 80 millimeters pp pipes are made skeleton, make product specification obtain expanding.
For extruder, extrusion capacity is certain, because material alleviates, tubing manufacturing efficiency improves; Simultaneously, owing to adopt the two-shipper mode to produce, increased an extruder, the speed of production of heavy caliber pipe will improve greatly.
The present invention is applied to soft pp pipe and polyethylene co-extrusion with steel-plastic coextrusion and aluminium plastic co-extruding Tool and Die Technology, mould specific has designed unique runner that ring release district, protruding center is arranged at corrugated flexible hose, indeformable when the high pressure co-extrusion to guarantee the PP pipe, also can adopt compound or modified plastics production further to reduce cost.
Description of drawings
Fig. 1 is coextruding heat winding structure wall pipe of the present invention and processing method schematic representation
Fig. 2 is a prior art processing method schematic representation
Fig. 3 is the processing mold structural representation of the coated poly single-wall corrugated pipe of co-extrusion
Fig. 4 is an enhancement mode double-wall structure wall pipe schematic representation
Among the figure:
A, plastic extruder B, plastic extruder C, distributing valve
1, pipe outer wall parcel plastics 2, single-wall corrugated pipe 3, plastics flat rubber belting
3-1, rectangular tube 3-2, stiffening rib 3-3, packed layer
4, mold core pipe 5, production tube 6, U-shaped plastic tape 7, plug 8, extrusion outlet
9, plastics 10, adpting flange 11, link 12, core rod 13, outlet discharge the district
14, mouthful mould 15, collecting plate 16, ring release district, protruding center 17, die holder
Embodiment
The structural feature and the processing mode of Fig. 2, prior art shown in Figure 1 and coextruding heat winding structure wall pipe of the present invention, the mode of production shown in Figure 2 is that an extruder A gives flat rubber belting extrusion die and U type band extrusion die feed by distributing valve C, extrude flat rubber belting and U type band, the coated polyethylene single-wall corrugated pipe of U type band becomes tubing as skeleton with common winding of flat rubber belting.Processing method of the present invention is two extruder A, B co-operation, extrudes flat rubber belting 3 for one, and another extrudes coated poly polypropylene single-wall corrugated pipe 2 by the co-extrusion mode, and online heat is wrapped on the mold core pipe 4 and forms tubing.The specification of these two kinds of products, quality and material consumption are to such as table 1:
Table 1
| Title | Caliber | Pp manages diameter | Ring stiffness | Mi Chong |
| Former large-diameter plastic pipe | 1.2M | 54CM | 7890N/M | 133.83KG |
| Large-diameter plastic pipe of the present invention | 1.2M | 65CM | 8010N/M | 98.33KG |
By table 1 as seen, produce the tubing of same caliber, owing to adopt different technology, have identical ring stiffness, under the prerequisite of identical using effect, every mitron material weight can reduce by 35.5 kilograms.
Another embodiment of coextruding heat winding structure wall pipe of the present invention is an enhancement mode double-wall structure wall pipe, as shown in Figure 4, its production method also is two extruder work, one of them extruder is extruded hollow and thin-walled rectangular tube 3-1 and is replaced flat rubber belting 3 as basic unit, outer wall twines the single-wall corrugated pipe 2 of the coated same material of bonding, online heat is wrapped on the mold core pipe 4 and forms tubing, rectangular tube can be provided with stiffening rib 3-2, it twines the slit and also is provided with poly packed layer 3-3, this constructed products is compared the ring stiffness that can effectively improve pipeline with the double-wall structure wall pipe of Korea S's technology production, makes product specification and performance obtain expanding.Save material contrast such as table 2:
| Title | Caliber | Pp manages diameter | Ring stiffness | Mi Chong |
| Former double-wall pipe | 1.6M | Do not have | 9345N/M | 224KG |
| The enhancement mode double-wall pipe | 1.6M | 65CM | 9584N/M | 185KG |
By table 2 as seen, under the identical situation of bore, every mitron heavily reduces by 39 kilograms, and the vast market popularizing prospect is arranged.
The processing mold of the coated polyethylene single-wall corrugated pipe of co-extrusion of the present invention's design shown in Figure 3, this mould is made of the cross extruder head, pass bellows 2 in the middle of the plug 7, between die holder 17, plug 7, the detachable core rod 12 runner is set, in order to prevent that bellows 2 is out of shape extruding under the high pressure, the runner of the present invention between core rod 12 and collecting plate 15 designed ring release district, protruding center 16 and outlet discharges district 13.
Mould of the present invention when product is remodeled owing to all be scyewed joint between core rod 12 and mouthful mould 14, the collecting plate 15, can be for convenience detach, significantly reduced the time of remodeling, the saving manpower and the energy are enhanced productivity.
Foregoing description is only as coextruding heat winding structure wall pipe of the present invention, and a kind of enforceable technological scheme of processing method and mould proposes, not as the single restrictive condition to its structure itself.
Claims (8)
1. coextruding heat winding structure wall pipe, be to go up the heavy caliber pipe that spiral heat is twined molding bonded as basic unit at mold core pipe (4) by plastic tape, it is characterized in that: the tube wall of this tubing is that hollow and thin-walled rectangular tube (3-1) is gone up spiral heat winding molding bonded at mold core pipe (4), and hollow and thin-walled rectangular tube outer wall heat is twined the single-wall corrugated pipe (2) of the coated same material of bonding co-extrusion.
2. according to the described coextruding heat winding structure wall pipe of claim 1, it is characterized in that: 1-3 stiffening rib (3-2) is set in the described hollow and thin-walled rectangular tube (3-1).
3. processing method of coextruding heat winding structure wall pipe according to claim 1 is characterized in that: adopt two parallel extruders, extruder is extruded hollow and thin-walled rectangular tube (3-1) and is gone up spiral heat as basic unit at mold core pipe (4) and twine; The coated poly single-wall corrugated pipe of another co-extrusion (2) is as stiffening rib, and the online heat of spiral successively is wrapped on the mold core pipe (4) of rotation and axial translation, molding bonded heavy caliber pipe (5).
4. according to the processing method of the described coextruding heat winding structure wall pipe of claim 3, it is characterized in that: described hollow and thin-walled rectangular tube (3-1) twines the slit and is filled with same material layer (3-3).
5. processing mold of the coated polyethylene single-wall corrugated pipe of co-extrusion (2) of coextruding heat winding structure wall pipe as claimed in claim 1 or 2, its basic structure comprises the cross extruder head that is made of die holder (17), plug (7), detachable core rod (12) and extrusion outlet (8), runner is characterized in that described runner is provided with ring release district, protruding center (16) between plug and core rod.
6. according to the processing mold of the coated polyethylene single-wall corrugated pipe of the described co-extrusion of claim 5 (2), it is characterized in that described detachable core rod (12) and plug scyewed joint.
7. according to the processing mold of the coated polyethylene single-wall corrugated pipe of the described co-extrusion of claim 5 (2), it is characterized in that described ring release district, protruding center (16) is arranged between detachable core rod (12) and the collecting plate (15).
8. according to the processing mold of the coated polyethylene single-wall corrugated pipe of the described co-extrusion of claim 5 (2), it is characterized in that described detachable core rod (12) and collecting plate (15) front are provided with a mouthful mould (14).
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| CNB2005100127516A CN100380040C (en) | 2005-08-26 | 2005-08-26 | Coextruding heat winding structure wall pipe, processing method and method |
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| CNB2005100127516A CN100380040C (en) | 2005-08-26 | 2005-08-26 | Coextruding heat winding structure wall pipe, processing method and method |
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| CN100380040C true CN100380040C (en) | 2008-04-09 |
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| CN1749626A (en) | 2006-03-22 |
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Owner name: FUJIAN NACHUAN TUBE SCIENCE CO., LTD. Free format text: FORMER OWNER: WANG LIQUN Effective date: 20090508 |
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Effective date of registration: 20090508 Address after: Pu Industrial Zone of Quangang District of Quanzhou city in Fujian Province Patentee after: Fujian Nachuan Pipe Technology Co., Ltd. Address before: Hebei province Shijiazhuang City Yinlong District 11 Building 1 unit 402 Patentee before: Wang Liqun |
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Effective date of registration: 20180928 Address after: 362000 Pu an industrial area, Quangang District, Quanzhou, Fujian. Patentee after: Fujian Nachuan pipe technology limited liability company Address before: 362000 Pu an industrial area, Quangang District, Quanzhou, Fujian. Patentee before: Fujian Nachuan Pipe Technology Co., Ltd. |
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