CN102601969A - Mould and process for one-mould-double-output forming of polypropylene random copolymer pipes - Google Patents

Mould and process for one-mould-double-output forming of polypropylene random copolymer pipes Download PDF

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Publication number
CN102601969A
CN102601969A CN201210066327XA CN201210066327A CN102601969A CN 102601969 A CN102601969 A CN 102601969A CN 201210066327X A CN201210066327X A CN 201210066327XA CN 201210066327 A CN201210066327 A CN 201210066327A CN 102601969 A CN102601969 A CN 102601969A
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CN
China
Prior art keywords
mould
shunting
extruder
moulds
diameter
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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.)
Pending
Application number
CN201210066327XA
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Chinese (zh)
Inventor
刘芳兴
王景旺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TIANJIN ZHONGCAI PROFILES CO Ltd
Original Assignee
TIANJIN ZHONGCAI PROFILES CO Ltd
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Application filed by TIANJIN ZHONGCAI PROFILES CO Ltd filed Critical TIANJIN ZHONGCAI PROFILES CO Ltd
Priority to CN201210066327XA priority Critical patent/CN102601969A/en
Publication of CN102601969A publication Critical patent/CN102601969A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/695Flow dividers, e.g. breaker plates
    • B29C48/70Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
    • B29C48/71Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows for layer multiplication
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/695Flow dividers, e.g. breaker plates
    • B29C48/70Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
    • B29C48/705Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows in the die zone, e.g. to create flow homogeneity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/92Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/92704Temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92819Location or phase of control
    • B29C2948/92961Auxiliary unit, e.g. for external melt filtering, re-combining or transfer between units

Abstract

A mould for one-mould-double-output forming of polypropylene random copolymer pipes comprises a distributing mould and two forming moulds. The distributing mould comprises an upper mould and a lower mould which are integrally connected by a bolt, a main runner and two outwards inclined sub-runners are formed inside the upper mould and the lower mould which are symmetric, the forming moulds are D25S4.0-type pipe moulds, and the distributing mould is arranged among an extruder and the two forming moulds. A process for one-mould-double-output forming of the polypropylene random copolymer pipes adopts sectioned heating, the temperature of the distributing mould ranges from 155 DEG C to 185 DEG C, and the production speed ranges from 8.5m/min to 11.5m/min. The mould and the process have the advantages that the mould is simple in structure, the process is easy to implement, a screw is extended by the forming moulds, material flow is sufficiently homogenized, production stability is further improved, the heating temperature of the process is reduced, the performance of the pipes is ensured, the productivity of the PP-R (polypropylene) pipes can be improved by 85%-95% by the aid of the distributing mould, and obvious economic and social benefits are achieved.

Description

A kind ofly be used for that random copolymerization polypropylene pipe one mould is two to go out forming mould and technology
Technical field
The present invention relates to the technology of preparing of polypropylene pipe, particularly a kind ofly be used for that random copolymerization polypropylene pipe one mould is two to go out forming mould and technology.
Background technology
Random copolymerization polypropylene pipe (being the PP-R pipe) is that Europe is in the novel plastic pipeline product of the Application and Development nineties in 20th century; PP-R pipe is except having the characteristics such as general plastic tube is in light weight, corrosion-resistant, non-scaling, also have good heat resistance, heat preservation energy-saving, non-toxic sanitary, easy for installation, connect advantages such as reliable.Its excellent cost performance makes it become the maximum a kind of water supply line of employing in the present house ornamentation engineering.
PP-R tubing is produced through extruding processing, and domestic each big production firm has more stable moulding process at present, but ubiquity the problem that production efficiency is low, the extruder production capacity fails to give full play to.If improve line speed in process of production merely, problems such as tube wall thickness fluctuation, performance reduction can appear again, and cause production stability to descend.
Be head it off; We grope through scrap build and test of many times; Designed and developed that an a kind of mould is two to go out PP-R tubing extrusion molding mould and technology, utilized a set of equipment and mould can produce two PP-R simultaneously and manage, effectively improved the integrated production capacity of PP-R tubing.
Summary of the invention
The objective of the invention is to above-mentioned existing problems; Provide a kind of and be used for that random copolymerization polypropylene pipe one mould is two to go out forming mould; This mould is into two structures that go out, and has found out a cover production technology to this mould simultaneously, make produce easy to implement; And can under the prerequisite that guarantees pipe performance and production stability, significantly improve the integrated production capacity of PP-R tubing, have tangible economic benefit and social benefit.
Technical scheme of the present invention:
A kind ofly be used for that random copolymerization polypropylene pipe one mould is two to go out forming mould; Constitute by shunting mould and two moulds; The shunting mould is the cuboid of being made up of measure-alike upper die and lower die, and the four corners position of upper die and lower die is respectively equipped with four dowel holes and four positioning through hole, and patrix is provided with fixed via; Counterdie is provided with fixing threaded hole; Upper die and lower die connect as one and form in inside a sprue and two outward-dipping runners and are symmetrical set through bolt, two sides of shunting mould respectively are provided with a thermocouple temperature control hole, and the front and rear surfaces of shunting mould is respectively equipped with the screw that is connected with mould with extruder; Mould adopts D25S4.0 type pipe mold, comprises outer die body, conveyor screw, anterior plug, rear portion plug; The shunting mould is arranged between extruder and two moulds; The merging core material outlet centering of its sprue and extruder is also fixed through bolt and extruder adpting flange, and two runners are fixed with the material inlet centering of two moulds and through bolt and mould adpting flange respectively.
The sprue diameter of said shunting mould is 40-70mm, and two runner point diameters are 35-58mm, and the rear end diameter is 32-55mm, and the length of two runners is 160-200mm, and angle is the 60-70 degree.
The diameter of said upper die and lower die locating hole is 15-20mm, and patrix fixing hole diameter is 12.5mm, and the counterdie fixing threaded hole is M12, and the diameter of connector bolt penetration hole is 12-15mm.
The total length of said mould is 280-420mm, and wherein spirochetal length is 90-115mm, and diameter is 35-50mm.
A kind of said two technologies that go out moulding of random copolymerization polypropylene pipe one mould that are used for, its parameter is set to:
1) extruder barrel feeding section temperature is 150-170 ℃, and melt zone and homogenizing zone temperature are 160-185 ℃, and the extruder moment of torsion is 95-115Nm;
2) the shunting mold temperature is 155-185 ℃;
3) every sleeve forming mould is divided into two sections heating, and the first section temperature that is positioned at the conveyor screw position is 175-190 ℃, and the second section temperature that is positioned at the plug position is 185-200 ℃, and speed of production is 8.5-11.5m/min.
Advantage of the present invention is: this mould structure is simple; Technology is easy to implement, and materials flow gets into two moulds by the shunting mould respectively after the shunting mould is divided into two; After conveyor screw shunting homogenizing; Plug and outside form the material runner between the die body, last extrusion molding, the shunting mould can guarantee stable extrusion pressure through the appropriate design of flow diameter and length; Mould prolongs conveyor screw, thereby has guaranteed the abundant homogenizing of materials flow, and production stability is further improved.Technological temperature reduces 8-15 ℃, and making to strengthen at die pressure has slightly with residence time of material that plasticizing rate keeps stablizing under the prerequisite of increase, thereby the performance of tubing is guaranteed.In sum, the present invention can improve PP-R tubing production capacity 85%-95% at pipe performance with producing under the stable prerequisite, has tangible economic benefit and social benefit.
Description of drawings
Fig. 1 is that the shunting mould is overlooked the sectional structure sketch map.
Fig. 2 is a shunting mould front elevational schematic.
Fig. 3 is that mould is overlooked the sectional structure sketch map.
Among the figure: 1. shunting upper mould 2. is shunted the material inlet 14. extruder adpting flanges 15. mould adpting flanges of merging core material outlet 13. moulds of lower moulds 3. positioning through hole 4. bolts 5. sprues 6. runners 7. thermocouple temperature control holes 8. outer die body 9. conveyor screws 10. anterior plug 11. rear portion plugs 12. extruders
The specific embodiment
Embodiment:
A kind ofly be used for that random copolymerization polypropylene pipe one mould is two to go out forming mould; Constitute by shunting mould and two moulds; The shunting mould is the cuboid of being made up of measure-alike patrix 1 and counterdie 2, and the four corners position of patrix 1 and counterdie 2 is respectively equipped with four alignment pins and four positioning through hole 3, and patrix 1 is provided with fixed via; Counterdie 2 is provided with fixing threaded hole; Patrix 1 connects as one and forms in inside a sprue 5 with two outward-dipping runners 6 and be symmetrical set through bolt 4 with counterdie 2, two sides of shunting mould respectively are provided with a thermocouple temperature control hole 7, and the front and rear surfaces of shunting mould is respectively equipped with the screw that is connected with mould with extruder; Mould adopts D25S4.0 type pipe mold, comprises outer die body 8, conveyor screw 9, anterior plug 10, rear portion plug 11; The shunting mould is arranged between extruder and two moulds; Its sprue 5 is fixed with merging core material outlet 12 centerings of extruder and through bolt and extruder adpting flange 14, and two runners 6 are also fixing through bolt and mould adpting flange 15 with material inlet 13 centerings of two moulds respectively.
Among this embodiment, the sprue diameter of shunting mould is 52mm, and two runner point diameters are 42mm, and the rear end diameter is 38mm, and the length of two runners is 175mm, and angle is 65 degree; The diameter of upper die and lower die locating hole is 16mm, and patrix fixing hole diameter is 12.5mm, and the counterdie fixing threaded hole is M12, and the diameter of connector bolt penetration hole is 13mm, and bolt is M12, and quantity is 10; The total length of mould is 320mm, and wherein spirochetal length is 102mm, and diameter is 40mm.
The said two technologies that go out moulding of random copolymerization polypropylene pipe one mould that are used for, its parameter is set to:
1) extruder barrel feeding section temperature is 155 ℃, and melt zone and homogenizing zone temperature are 165 ℃, and the extruder moment of torsion is 102Nm;
2) the shunting mold temperature is 170 ℃;
3) every sleeve forming mould is divided into two sections heating, and the first section temperature that is positioned at the conveyor screw position is 180 ℃, and the second section temperature that is positioned at the plug position is 195 ℃, and speed of production is 9.8m/min.
During use, the material after extruder plasticizing gets into the shunting mould, through two go out the runner shunting after, overlap the PP-R moulds through two respectively, can make the material of fusion be extruded into PP-R tubing.

Claims (5)

1. one kind is used for that random copolymerization polypropylene pipe one mould is two to go out forming mould; It is characterized in that: constitute by shunting mould and two moulds; The shunting mould is the cuboid of being made up of measure-alike upper die and lower die; The four corners position of upper die and lower die is respectively equipped with four dowel holes and four positioning through hole; Patrix is provided with fixed via, and counterdie is provided with fixing threaded hole, and upper die and lower die connect as one and form in inside a sprue and two outward-dipping runners and are symmetrical set through bolt; Two sides of shunting mould respectively are provided with a thermocouple temperature control hole, and the front and rear surfaces of shunting mould is respectively equipped with the screw that is connected with mould with extruder; Mould adopts D25S4.0 type pipe mold, comprises outer die body, conveyor screw, anterior plug, rear portion plug; The shunting mould is arranged between extruder and two moulds; The merging core material outlet centering of its sprue and extruder is also fixed through bolt and extruder adpting flange, and two runners are fixed with the material inlet centering of two moulds and through bolt and mould adpting flange respectively.
2. be used for according to claim 1 is said that random copolymerization polypropylene pipe one mould is two to go out forming mould; It is characterized in that: the sprue diameter of said shunting mould is 40-70mm; Two runner point diameters are 35-58mm; The rear end diameter is 32-55mm, and the length of two runners is 160-200mm, and angle is the 60-70 degree.
3. be used for according to claim 1 is said that random copolymerization polypropylene pipe one mould is two to go out forming mould; It is characterized in that: the diameter of said upper die and lower die locating hole is 15-20mm; Patrix fixing hole diameter is 12.5mm; The counterdie fixing threaded hole is M12, and the diameter of connector bolt penetration hole is 12-15mm.
4. be used for according to claim 1 is said that random copolymerization polypropylene pipe one mould is two to go out forming mould, it is characterized in that: the total length of said mould is 280-420mm, and wherein spirochetal length is 90-115mm, and diameter is 35-50mm.
5. one kind is used for the two technologies that go out moulding of random copolymerization polypropylene pipe one mould according to claim 1, it is characterized in that parameter is set to:
1) extruder barrel feeding section temperature is 150-170 ℃, and melt zone and homogenizing zone temperature are 160-185 ℃, and the extruder moment of torsion is 95-115Nm;
2) the shunting mold temperature is 155-185 ℃;
3) every sleeve forming mould is divided into two sections heating, and the first section temperature that is positioned at the conveyor screw position is 175-190 ℃, and the second section temperature that is positioned at the plug position is 185-200 ℃, and speed of production is 8.5-11.5m/min.
CN201210066327XA 2012-03-14 2012-03-14 Mould and process for one-mould-double-output forming of polypropylene random copolymer pipes Pending CN102601969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210066327XA CN102601969A (en) 2012-03-14 2012-03-14 Mould and process for one-mould-double-output forming of polypropylene random copolymer pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210066327XA CN102601969A (en) 2012-03-14 2012-03-14 Mould and process for one-mould-double-output forming of polypropylene random copolymer pipes

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104260308A (en) * 2014-08-29 2015-01-07 辽宁程威塑料型材有限公司 Co-extrusion forming method for plastic profile and sealing rubber strip
CN104456409A (en) * 2014-11-10 2015-03-25 桐乡市佳盛塑料制品有限公司 LED lampshade and extrusion forming device thereof
CN109291403A (en) * 2018-10-23 2019-02-01 苏州金纬管道科技有限公司 The double extruders out of one mould
WO2021017511A1 (en) * 2019-08-01 2021-02-04 安徽森泰木塑集团股份有限公司 Extruder die and wood plastic extruder having same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0586109A2 (en) * 1992-08-11 1994-03-09 Sumitomo Chemical Company, Limited Polypropylene compositions and films thereof
JP3113013B2 (en) * 1991-11-13 2000-11-27 三井化学株式会社 Molding method for syndiotactic polypropylene
CN201120712Y (en) * 2007-10-31 2008-09-24 佛山市南海易乐工程塑料有限公司 Engineering plastic special-shaped section bar extruding-forming device
CN201249515Y (en) * 2008-06-16 2009-06-03 新疆天业(集团)有限公司 Plastic pipe extrusion die with high-speed extrusion, large caliber and thin wall
CN101791850A (en) * 2010-04-13 2010-08-04 张家港联冠新材料有限公司 One-mould multi-discharge extruding pipe mould head for super high molecular weight polyethylene

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3113013B2 (en) * 1991-11-13 2000-11-27 三井化学株式会社 Molding method for syndiotactic polypropylene
EP0586109A2 (en) * 1992-08-11 1994-03-09 Sumitomo Chemical Company, Limited Polypropylene compositions and films thereof
CN201120712Y (en) * 2007-10-31 2008-09-24 佛山市南海易乐工程塑料有限公司 Engineering plastic special-shaped section bar extruding-forming device
CN201249515Y (en) * 2008-06-16 2009-06-03 新疆天业(集团)有限公司 Plastic pipe extrusion die with high-speed extrusion, large caliber and thin wall
CN101791850A (en) * 2010-04-13 2010-08-04 张家港联冠新材料有限公司 One-mould multi-discharge extruding pipe mould head for super high molecular weight polyethylene

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104260308A (en) * 2014-08-29 2015-01-07 辽宁程威塑料型材有限公司 Co-extrusion forming method for plastic profile and sealing rubber strip
CN104456409A (en) * 2014-11-10 2015-03-25 桐乡市佳盛塑料制品有限公司 LED lampshade and extrusion forming device thereof
CN109291403A (en) * 2018-10-23 2019-02-01 苏州金纬管道科技有限公司 The double extruders out of one mould
WO2021017511A1 (en) * 2019-08-01 2021-02-04 安徽森泰木塑集团股份有限公司 Extruder die and wood plastic extruder having same

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Application publication date: 20120725