CN100457424C - Process for producing large caliber hard polyvinyl chloride double wall corrugated pipe - Google Patents
Process for producing large caliber hard polyvinyl chloride double wall corrugated pipe Download PDFInfo
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- CN100457424C CN100457424C CNB2004100667168A CN200410066716A CN100457424C CN 100457424 C CN100457424 C CN 100457424C CN B2004100667168 A CNB2004100667168 A CN B2004100667168A CN 200410066716 A CN200410066716 A CN 200410066716A CN 100457424 C CN100457424 C CN 100457424C
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- Prior art keywords
- corrugated pipe
- wall
- double
- wall corrugated
- polyvinyl chloride
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/695—Flow dividers, e.g. breaker plates
- B29C48/70—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
- B29C48/71—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows for layer multiplication
Abstract
The production process can produce double wall corrugated pipe of hard polyvinyl chloride and in the caliber up to 800 mm and the corrugated pipe is used for conveying liquid or solid material and protecting under ground wires. The production process includes the following steps: preparing materials including PVC resin, composite stabilizer, stearic acid, PE wax, chlorinated polyethylene and calcium carbonate; kneading the materials in a high speed kneading machine for 12-16 min, stirring in low speed cold mixer at 115-125 deg.c, extruding in a double screw extruder at 90-210 deg.c, setting and drawing in a blowing and sucking molding formation machine, cutting and flaring.
Description
Technical field
The present invention relates to a kind of manufacture method that is used to carry solid, liquid attitude material or is used for the corrugated dual-wall hard PVC pipe of the various underground preburied lines of sheath, particularly a kind ofly can produce the production technology that external diameter reaches the bigbore corrugated dual-wall hard PVC pipe of 800mm.
Background technology
A kind of corrugated dual-wall hard PVC pipe, its structure can from it main cutaway view Fig. 1 and its node I enlarged drawing Fig. 2 see, its tube wall include inwall 4b and with inwall disjunctor and the outer wall 4a that outwards heaves.At present light, rigidity of the quality because of it and intensity height, and protection against the tide, anticorrosion, manufacturing cost is lower and be widely used in that underground various of sheath are sunken cord in advance and the conveying of various solid, liquid attitude materials, and along with increasing of the construction in city and development, underground preburied pipeline amount, people more and more need a kind of bigbore corrugated dual-wall hard PVC pipe, to improve its service efficiency.But with regard to the production technology of existing corrugated dual-wall hard PVC pipe, also can not produce bigbore corrugated dual-wall hard PVC pipe, especially can not produce the corrugated dual-wall hard PVC pipe that external diameter reaches 800mm.Its reason has process aspect, the problem that former is also arranged, wherein the problem of process aspect is: when producing bigbore corrugated dual-wall hard PVC pipe, the time that material stops in the barrel of extruder and extrusion die is long, logistics is not happy, yet the decomposition temperature of the processing temperature of corrugated dual-wall hard PVC pipe and PVC-U raw material is very approaching, be easy to cause material to decompose variable color, and material also sticks on the forming surface of mould, must shut down cleaning for this reason; Therefore, the phenomenon of produce interrupting is also relatively more serious, causes that productivity ratio is low, cleaning is pretty troublesome takes a lot of work again; The problem of former can see from the structure of existing corrugated dual-wall hard PVC pipe former shown in Figure 4 earlier that it comprises joint 1, shaping mechanism 3 and the dispensing head 2 that air water distributes that is used for that is arranged between joint 1 and the shaping mechanism 3 of a band charging aperture 1a that can be communicated with extruder (being represented among the figure); Wherein shaping mechanism 3 comprises a die head 3b and shuttling movement is finished a pack module 3a of the compression molding of double-wall corrugated pipe on rack rail and with die head, and the water jacket 3c that can carry out water-cooled to the inwall 4b in the moulding that is provided with between module 3a and die head 3b; Have water inlet 2a, delivery port 2b and compressed air inlet 2c on the dispensing head 2, and have in it can be to the forming process air feed with the air flue of the outer wall 4a of external drum double-wall corrugated pipe and the aquaporin that can supply water to water jacket 3c; Though this former can be produced the corrugated dual-wall hard PVC pipe of general bore, but when producing large caliber hard polyvinyl chloride double wall corrugated pipe, its outer wall 4a is difficult for the whole external drums of concave shape by module, but flat in occurring to some extent, that is occurs flat muscle on product; So not only influence the outward appearance of corrugated dual-wall hard PVC pipe, and its rigidity, intensity reduces significantly all, become substandard products or waste product.
Chinese patent CN1346844A disclosed " the preparation material of corrugated dual-wall hard PVC pipe ", only the production technology of corrugated dual-wall hard PVC pipe has been done improvement from the angle of preparation material, to avoid the material in the production process to decompose, but contain powder in its component, as AC316, so can be in process for preparation because of the airborne dust contaminated environment; In addition, its double-wall corrugated pipe also is by material heating, shearing, the plasticizing of extruder to mediating, and under molten condition by cooling plug and the extrusion modling of ripple module, it also can only make small-bore corrugated dual-wall hard PVC pipe, otherwise also flat muscle will occur, forms substandard products or waste product.
Summary of the invention
The present invention will solve currently can't produce heavy caliber, especially external diameter reaches the problem of the corrugated dual-wall hard PVC pipe of 800mm, a kind of production technology of large caliber hard polyvinyl chloride double wall corrugated pipe is provided, production process is continuous, production efficiency is high so that it has, and on this double-wall corrugated pipe characteristics such as no flat muscle, reliable product quality.
The production technology of large caliber hard polyvinyl chloride double wall corrugated pipe of the present invention contains following step successively:
1) be that unit gets the raw materials ready: polyvinyl chloride resin 100 with the weight portion
Compound stabilizer 5～7
Stearic acid 0.9～1.5
PE wax 0.4～1.0
Haloflex 4～6
Calcium carbonate 5～10
2) batch mixing: the high speed kneader is put in above-mentioned getting the raw materials ready, and the high speed batch mixing is mediated 12～16min and blowing under 115～125 ℃ temperature;
3) stir cooling: above-mentioned batch mixing is put into the low speed cold mixer stirs, and when temperature reaches 45～55 ℃ blowing;
4) extrude: will stir cooled material and put into the double screw extruder that rotating speed and make-up machine are complementary, and under 90～210 ℃ temperature, extrude;
5) moulding: have typing traction in the compression molding forming machine that blows, inhales simultaneously at one;
6) double-wall corrugated pipe that obtains cuts through cutting machine, and can check the storehouse after to the enlarging of one end on the pipe-expanding machine.
The present invention except weighing strictly, whenever finishes an assembly material and must carry out multiple title monitoring, and measurement instrument is carried out zero correction in melting process.To guarantee accurate measurement.
The former that technology of the present invention is used, it comprises joint, shaping mechanism and a dispensing head that is provided with of a band charging aperture that can be communicated with extruder between joint and shaping mechanism; Wherein shaping mechanism comprises a die head and one group of shuttling movement can be finished the double-wall corrugated pipe compression molding with die head on rack rail module, and the water jacket that can carry out water-cooled that between module and die head, is provided with to the inwall in the moulding, have water inlet, delivery port and compressed air inlet on the dispensing head, and have in it can be to the forming process air feed with the air flue of the outer wall of external drum double-wall corrugated pipe and the aquaporin that can supply water to water jacket; Characteristics of the present invention are: have the duct that is connected with vacuum-pumping system on its module.
The invention has the beneficial effects as follows: 1) by reasonably selecting materials and proportioning, can make the production process of large caliber hard polyvinyl chloride double wall corrugated pipe avoid that logistics is smooth, material decomposes variable color, material sticks to the first-class phenomenon of forming surface of mould, can carry out, improve production efficiency continuously thereby guarantee to produce; 2) the selected material of the present invention all can airborne dust, so non-environmental-pollution; 3) on each module, be provided with existing make-up machine with duct that pumped vacuum systems is connected after because the outer wall of the double-wall corrugated pipe in the moulding is subjected to blowing power and outside suction force outwards outward simultaneously, so flat muscle no longer occurs, guarantee the up-to-standard of product.
Description of drawings
Fig. 1 is the main cutaway view of the corrugated dual-wall hard PVC pipe produced of the present invention;
Fig. 2 is the node I enlarged drawing among Fig. 1;
Fig. 3 is the shaping mechanism structure diagram in the make-up machine that adopted of production technology forming process of the present invention;
Fig. 4 is the shaping mechanism structure diagram in the make-up machine that is adopted in the existing production technology forming process.
Label declaration among the figure: 1-joint; The 1a-charging aperture; The 2-dispensing head; The 2a-water inlet; The 2b-delivery port; The 2c-compressed air inlet; The 3-shaping mechanism; The 3a-module; The 3b-die head; The 3c-water jacket; The duct that 3d-is connected with pumped vacuum systems; The 4-corrugated dual-wall hard PVC pipe; The outer wall of 4a-double-wall corrugated pipe; The double-wall corrugated inside pipe wall of 4b-.
The specific embodiment
The production technology of embodiment 1, present embodiment large caliber hard polyvinyl chloride double wall corrugated pipe contains following step successively:
1) get the raw materials ready: the unit of each component is a weight portion polyvinyl chloride resin (being Corvic) 100
Compound stabilizer 5～7
Stearic acid 0.9～1.5
PE wax (being Tissuemat E) 0.4～1.0
Haloflex 4～6
Calcium carbonate 5～10
In above-mentioned the getting the raw materials ready, high performance compound stabilizer is the SMR50354 compound stabilizer that the German bear board company of buying from the domestic market produces, and it can be used as the stable allocation system of material; Calcium carbonate is the filler of the superfine activated PVC of a kind of energy, is using required rigidity with dimensionally stable and the product that guarantees product; Stearic acid then is lubricated in being used for, and PE wax can be used for outer lubricating, and has formed reasonably inside and outside lubricating system by them.Above-mentioned haloflex is the impact modifier of PVC, can strengthen the shock resistance of double-wall corrugated pipe, can also solve the rigidity of pvc material and the contradiction between the plasticity effectively.
2) the high speed kneader is put in above-mentioned getting the raw materials ready, mediated 12～16 minutes and blowing under 115～125 ℃ temperature at 1200 rev/mins of following batch mixings; With the preplasticizing of assurance polyvinyl chloride resin and the even dispersion of various materials.
3) above-mentioned batch mixing is put into the low speed cold mixer, under 500 rev/mins speed, stirs, and when temperature reaches 45～55 ℃ blowing; With guarantee material evenly, fully cooling, thereby make blanking, extrude stable;
4) will stir cooled material and put into the double screw extruder that screw speed and thereafter make-up machine speed are complementary, and under 90～210 ℃ temperature, extrude; The shear temperature that high shear force produced in the screw cylinder has promoted the plasticizing of material in it, thereby improves the plasticizing rate of extruding material base, guarantees to demonstrate,prove material base moulding fully in the forming module of postorder;
5) material that comes out from extruder promptly enters as shown in Figure 3 the make-up machine, at this moment extruded stock enters from the charging aperture 1a of joint 1, at joint 1, advance to the right in the circular passage by the solid arrow direction in the dispensing head 2, and in dispensing head 2 bifurcated, in inside and outside two circular passages, continue to advance to the right respectively, extruded stock in the wherein interior circular passage enters between the module 3a and die head 3b of shaping mechanism 3, with the inwall 4b of formation corrugated dual-wall hard PVC pipe, and the extruded stock in the outer ring passage enters in the module 3a of shaping mechanism 3, to form the outer wall 4a of PVC dual-wall ripple pipe; In the forming process of inwall 4b and outer wall 4a, the compressed air that enters from the compressed air inlet 2c of dispensing head 2 is blown in the module 3a (represents the compressed-air actuated flow direction with the solid arrow in the dispensing head air flue the figure), and the duct 3d that is connected with pumped vacuum systems that is arranged on the die head 3b outwards attracts the outer wall 4a of moulding simultaneously, because extruded stock all is subjected to compressed air that blows from inside to outside and the effect that constantly outwards vacuumizes simultaneously in each module 3a, the shape of outer wall can be in full accord with the concave shape of module 3a, so avoided effectively that double-wall corrugated pipe outer wall 4a's is interior flat; At the initial stage of above-mentioned double-wall corrugated pipe moulding,, yet, fully in the typing module, closed cooling water recirculation system is installed for making typing in the moulding later stage because of the mobile performance that will guarantee material makes the material base temperature in extruder head, the shaping mechanism higher relatively; Closed cooling water recirculation system in the present embodiment is water jacket 3c, and it is arranged on the outer wall of die head 3b, so that bellows inwall 4b is subjected to the water-cooled of water jacket 3c and finishes typing, and is pulled out machine from right-hand member.In the whole typing distraction procedure of PVC dual-wall ripple pipe, module 3a enters interior rail by the outer rail of frame, and closes up with die head 3b and to carry out molding operation, mold pressing and finish and then get back to outer rail (solid arrow on module 3a next door is represented the direction of its shuttling movement work and return) from interior rail; Cooling water then enters water jacket 3c from the water inlet 2a of dispensing head 2, behind the heat that shifts out inwall 4b, promptly from water jacket, comes out, and outside delivery port 2b flows out machine (flow direction of in aquaporin, representing water the figure with solid arrow).
Above-mentioned extruded stock is in forming process, because the outer wall 4a of bellows is compressed air advertising and the constantly effect of outside suction from inside to outside simultaneously, the outer wall shape interior concave shape complete and module 3a of large caliber hard polyvinyl chloride double wall corrugated pipe is fitted like a glove, flat substandard products or the waste product of forming in the outer wall because of double-wall corrugated pipe therefore no longer occur.
The production technology of embodiment 2, present embodiment large caliber hard polyvinyl chloride double wall corrugated pipe, different is with embodiment 1: in melting process, except weighing strictly, whenever finish an assembly material and all must carry out multiple title monitoring, and measurement instrument carried out zero correction, to guarantee accurate measurement.
Double screw extruder in the present embodiment is to adopt a kind of at present domestic the most advanced SJSZ-95/191 type conical double screw extruder of outsourcing, its extrusion capacity hourly can reach 11000kg, can guarantee the abundant plasticizing and the continuously shaped required material supply of heavy caliber bellows of material effectively.
Extrusion die in the present embodiment is to select for use superior alloy steel to forge blank, and does total control processing after the modified heat treatment, and its surface roughness rank reaches more than 0.4, and then carries out surface treatment with ion nitriding technology.Because in the large caliber hard polyvinyl chloride double wall corrugated pipe production process, the environment for use of extrusion die is comparatively abominable, adds the erosion that is subjected to etchant gas for a long time under heating status, and will guarantee that material is not interrupted in flow process; After above-mentioned selection and processing, processing, can guarantee the performance of its normal service behaviour and wear resistant corrosion resistant.
Claims (3)
1, a kind of production technology of large caliber hard polyvinyl chloride double wall corrugated pipe, contain following step successively:
1) be that unit gets the raw materials ready: polyvinyl chloride resin 100 with the weight portion
SMR50354 compound stabilizer 5～7
Stearic acid 0.9～1.5
PE wax 0.4～1.0
Haloflex 4～6
Calcium carbonate 5～10
2) batch mixing: the high speed kneader is put in above-mentioned getting the raw materials ready, and the high speed batch mixing is mediated 12～16min and blowing under 115～125 ℃ temperature;
3) stir cooling: above-mentioned batch mixing is put into the low speed cold mixer stirs, and when temperature reaches 45～55 ℃ blowing;
4) extrude: will stir cooled material and put into the double screw extruder that rotating speed and make-up machine are complementary, and under 90～210 ℃ temperature, extrude;
5) moulding: have typing traction in the compression molding forming machine that blows, inhales simultaneously at one;
6) double-wall corrugated pipe that obtains cuts through cutting machine, and can check warehouse-in after to the enlarging of one end on the pipe-expanding machine.
2, the production technology of large caliber hard polyvinyl chloride double wall corrugated pipe according to claim 1 is characterized in that: in the melting process, except weighing strictly, whenever finish an assembly material and all must carry out multiple title monitoring, and measurement instrument is carried out zero correction.
3, a kind ofly implement claim 1 or 2 described technologies and special-purpose former, it comprises the dispensing head (2) of joint (1), shaping mechanism (3) and a setting between joint (1) and shaping mechanism (3) of a band charging aperture (1a) that can be communicated with extruder; Wherein shaping mechanism (3) comprises a die head (3b) and one group of shuttling movement can be finished the double-wall corrugated pipe compression molding with die head on rack rail module (3a), and the water jacket (3c) that can carry out water-cooled that between module (3a) and die head (3b), is provided with to the inwall in the moulding (4b), have water inlet (2a) on the dispensing head (2), delivery port (2b) and compressed air inlet (2c), and have in it and can it is characterized in that: have the duct (3d) that is connected with vacuum-pumping system on its module (3a) to the forming process air feed with the air flue of the outer wall (4a) of external drum double-wall corrugated pipe and the aquaporin that can supply water to water jacket (3c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100667168A CN100457424C (en) | 2004-09-28 | 2004-09-28 | Process for producing large caliber hard polyvinyl chloride double wall corrugated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100667168A CN100457424C (en) | 2004-09-28 | 2004-09-28 | Process for producing large caliber hard polyvinyl chloride double wall corrugated pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1586866A CN1586866A (en) | 2005-03-02 |
| CN100457424C true CN100457424C (en) | 2009-02-04 |
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| CNB2004100667168A Active CN100457424C (en) | 2004-09-28 | 2004-09-28 | Process for producing large caliber hard polyvinyl chloride double wall corrugated pipe |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219966B (en) * | 2011-05-25 | 2012-11-07 | 周云全 | Double-wall corrugated pipe produced by utilizing waste and old hard polyvinyl chloride (PVC) material and manufacturing method thereof |
| CN102218808B (en) * | 2011-06-02 | 2013-01-30 | 张家港市同创机械有限公司 | Die head for manufacturing breathing mask |
| CN102775696A (en) * | 2012-07-18 | 2012-11-14 | 盐城嘉诚塑胶有限公司 | Formula and production technology of PVC (Poly Vinyl Chloride) double-wall corrugated pipe |
| CN103542192A (en) * | 2013-10-30 | 2014-01-29 | 安徽国通高新管业股份有限公司 | Double-wall corrugated pipe |
| CN103554774A (en) * | 2013-10-30 | 2014-02-05 | 安徽国通高新管业股份有限公司 | Anti-leakage double-wall corrugated pipe |
| CN105328890A (en) * | 2015-11-20 | 2016-02-17 | 安徽微威胶件集团有限公司 | Production process for corrugated pipes |
| CN106432951A (en) * | 2016-09-12 | 2017-02-22 | 上海公元建材发展有限公司 | High-impact-resistant-polyvinyl-chloride double-wall corrugated pipe and preparing method thereof |
| CN106564176A (en) * | 2016-09-29 | 2017-04-19 | 联塑市政管道（河北）有限公司 | Double-wall corrugated pipe inner wall cooling and setting process |
| CN107877885A (en) * | 2017-12-05 | 2018-04-06 | 浙江远旺电力设备有限公司 | The processing technology of high-performance novel macromolecular fibre pipe |
| CN108297377B (en) * | 2018-01-03 | 2019-12-20 | 浙江双林机械股份有限公司 | Heating device in double-wall corrugated pipe extrusion die head |
| CN108948580A (en) * | 2018-06-27 | 2018-12-07 | 江苏诺贝尔塑业有限公司 | A kind of Double-wall PVC bellows and preparation method thereof |
| CN111037902B (en) * | 2019-06-04 | 2021-08-24 | 安徽富通塑业科技有限公司 | Flaring segmented forming control method for large-diameter PE double-wall corrugated pipe |
| CN110370696A (en) * | 2019-07-26 | 2019-10-25 | 大连三垒科技有限公司 | A kind of production line suitable for heavy caliber PVC-U double-wall corrugated pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0269223A (en) * | 1988-09-02 | 1990-03-08 | Yazaki Corp | Method for removing flaw or the like on surface of corrugated pipe made of synthetic resin |
| CN1346844A (en) * | 2001-07-21 | 2002-05-01 | 安徽国通高新管业股份有限公司 | Raw materials for preparing corrugated dual-wall hard PVC pipe |
-
2004
- 2004-09-28 CN CNB2004100667168A patent/CN100457424C/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0269223A (en) * | 1988-09-02 | 1990-03-08 | Yazaki Corp | Method for removing flaw or the like on surface of corrugated pipe made of synthetic resin |
| CN1346844A (en) * | 2001-07-21 | 2002-05-01 | 安徽国通高新管业股份有限公司 | Raw materials for preparing corrugated dual-wall hard PVC pipe |
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| CN1586866A (en) | 2005-03-02 |
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Owner name: HANGZHOU BODA PLASTICS SCIENCE AND TECHNOLOGY CO., Free format text: FORMER OWNER: HANGZHOU BODA PLASTICS CO., LTD. Effective date: 20100108 |
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Effective date of registration: 20100108 Address after: Yuhang Hangzhou industrial city, Zhejiang province Hangzhou plastic Polytron Technologies Inc Patentee after: Hangzhou Boda Plastics Technology Incorporated Co., Ltd. Address before: Hangzhou City, Zhejiang province Yuhang industrial city, Hangzhou to plastic industry Co., Ltd. Patentee before: Boda Plastic Industry Co., Ltd., Hangzhou |