CN105216277A - A kind of polypropylene pipe burning optimization on line production method - Google Patents
A kind of polypropylene pipe burning optimization on line production method Download PDFInfo
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- CN105216277A CN105216277A CN201510672446.3A CN201510672446A CN105216277A CN 105216277 A CN105216277 A CN 105216277A CN 201510672446 A CN201510672446 A CN 201510672446A CN 105216277 A CN105216277 A CN 105216277A
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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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/905—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using wet calibration, i.e. in a quenching tank
-
- 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
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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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/91—Heating, e.g. for cross linking
- B29C48/9105—Heating, e.g. for cross linking of hollow 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
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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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/904—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using dry calibration, i.e. no quenching tank, e.g. with water spray for cooling or lubrication
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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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/91—Heating, e.g. for cross linking
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
- B29C48/912—Cooling of hollow articles of tubular films
- B29C48/913—Cooling of hollow articles of tubular films externally
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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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
- B29C48/916—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means using vacuum
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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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/918—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of polypropylene pipe burning optimization on line production method, comprise the following steps: A, atactic copolymerized polypropene raw material is carried out fusion plastification after extrude formation tubing; B, described tubing is carried out sizing cooling; C, on-line heating is carried out to the cooled tubing of sizing; D, the tubing after on-line heating to be cooled again, obtain described polypropylene pipe.The present invention carries out burning optimization on line again after carrying out sizing cooling to tubing, the internal stress that the inside and outside temperature difference reducing tubing causes; And tubing is heated evenly, stable performance.In addition, the present invention, under the prerequisite not affecting tubing production efficiency, compared with traditional technique, improves and melt extrudes temperature 10-30 DEG C, and tubing can be made after experience first segment vacuum cooled sizing still to keep higher temperature.Utilize production method of the present invention to produce tubing, both can reduce and account for floor area, a procedure can be decreased again with artificial, greatly can reduce production cost, and production efficiency be high.
Description
Technical field
The present invention relates to polypropylene pipe production technology, specifically, is a kind of polypropylene pipe burning optimization on line production method.
Background technology
Atactic copolymerized polypropene (PPR) has the advantages such as quality is light, term creep resistance energy is good, sanitation performance is good.The tubing of polypropylene random copolymer material uses to reach 50 years projected life, in water delivery process compared with metal pipe material, can not produce secondary pollution, inner wall smooth water project situation is good, connection construction is convenient, has become the Building Cooling water system polyolefin pipe that domestic current application is maximum.Domestic at present 400,000 tons/year are about to the raw-material demand of PPR.
Between atactic copolymerized polypropene molecule wafer, tie molecule content is higher, and processing temperature scope is wide, is particularly suitable for tubing and produces.But because self vitrification point of this raw material is lower, simultaneously in the manufacture process of tubing, because the type of cooling is spray or immersion, cause tubing external refrigeration fast, the phenomenon that internal cooling is slow, make tubing ectonexine produce thermograde large, there is irregular thermal stress, reduce the hydraulic pressure strength of tubing, cause this tubing to there is the features such as shock resistance difference, limit the application of tubing in some regions.Particularly in north cold area, fall in the throwing of transportation and work progress and be easy to cause tubing break, cause the emphasis of PPR pipe quality dispute.Feeding back in the test of national chemical building material test center, only having the sample of 30% by detecting.Part tubing manufacturer carries out modification by interpolation rigid particles or flexibilizer to PPR, but sacrifices the hydraulic pressure strength of tubing undoubtedly while toughness reinforcing raising, also cannot solve the tubing stress defect produced aborning simultaneously.Only a few producer adopts baking oven heat treatment technics after tubing rolls off the production line, and be positioned over baking oven after being rolled off the production line by the tubing of 4 meters long and heat-treat, general heat treatment time is 3 hours, and temperature is 100 degrees Celsius.Tubing is finer and closely woven through baking oven heat treatment post crystallization, and pipe performance promotes to some extent.But there is following defect in the baking oven heat treatment after rolling off the production line: 1. because baking oven heat-transfer effect is difficult to control evenly, oven technique itself exists certain unstability, causes the impact property of product to fluctuate larger; 2. occupied ground, power consumption are high; 3. add a procedure, cause recruitment quantity to improve.4. tubing cannot carry out on-line automatic packaging, hinders for automated production is formed.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of polypropylene pipe burning optimization on line production method, production process floor space is little, power consumption less, cost is low, and automaticity is high, recruitment is few, the pipe workpiece quality produced and performance uniform and stable, effectively improve hydraulic pressure strength and the low-temperature impact-resistant performance of the tubing produced simultaneously.
In order to solve the problems of the technologies described above, the invention provides a kind of polypropylene pipe burning optimization on line production method, comprising the following steps:
A, atactic copolymerized polypropene raw material is carried out fusion plastification after extrude formation tubing;
B, described tubing is carried out sizing cooling;
C, on-line heating is carried out to the cooled tubing of sizing;
D, the tubing after on-line heating to be cooled again, obtain described polypropylene pipe.
Further, in described steps A, the barrel zone temperature carried out when fusion plastification is extruded is respectively: one section 180 DEG C, two sections 180 DEG C, three sections 190 DEG C, and four sections 190 DEG C, die head temperature is respectively 1-5 section: 190 DEG C, 6-8 section 200 DEG C.
Further, in described step B, adopt the first cooling water tank that described tubing is carried out sizing cooling, wherein, described first cooling water tank length is 2 meters, and the water temperature in the first cooling water tank is 15-23 DEG C, and the gait of march of tubing in the first cooling water tank is 15m/min.
Further, in described step C, adopt infrared heating device to carry out on-line heating to described tubing, infrared heating segment length is 1.2 meters.
Further, described infrared heating device is formed by multiple infrared heating pipe circular array, and the chamber portion that multiple described infrared heating pipe surrounds passes through for described tubing.
Further, described infrared heating device also comprises the support be arranged on below multiple infrared heating pipe, is provided with controller in described support, and described multiple infrared heating pipe upper outside is provided with over cap.
Further, in described step D, adopt cooler bin again to cool described tubing, the constant temperature air-flow that described tubing row in described cooler bin cooled or passed in cooler bin 60-80 DEG C naturally cools.
Further, described cooler bin has multistage.
Further, the second cooling water tank is also provided with after described cooler bin; Enter in the second cooling water tank after described tubing cools in cooler bin again and complete final cooling, the water temperature in described second cooling water tank is 20-35 DEG C.
Further, also comprise after described step D:
E, the described polypropylene pipe obtained is cut into preset length, and the tubing after cutting is carried out at wire wrapping.
The present invention carries out burning optimization on line again after carrying out sizing cooling to tubing, the internal stress that the inside and outside temperature difference reducing tubing causes; And tubing is heated evenly, stable performance.In addition, the present invention, under the prerequisite not affecting tubing production efficiency, compared with traditional technique, improves and melt extrudes temperature 10-30 DEG C, and tubing can be made after experience first segment vacuum cooled sizing still to keep higher temperature.Utilize production method of the present invention to produce tubing, both can reduce and account for floor area, a procedure can be decreased again with artificial, greatly can reduce production cost, and production efficiency be high.
Accompanying drawing explanation
Fig. 1 is the process chart of polypropylene pipe burning optimization on line production method.
Fig. 2 is the structural representation of an embodiment of infrared heating device in the present invention.
Fig. 3 is the cooling procedure artwork of polypropylene pipe burning optimization on line production method of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described, and to make those skilled in the art the present invention may be better understood and can be implemented, but illustrated embodiment is not as a limitation of the invention.
As shown in Figure 1, a kind of polypropylene pipe burning optimization on line production method of the present invention, comprises the following steps:
Step 101: extrude formation tubing after atactic copolymerized polypropene raw material is carried out fusion plastification;
Step 102: described tubing is carried out sizing cooling;
Step 103: on-line heating is carried out to the cooled tubing of sizing;
Step 104: again cool the tubing after on-line heating, obtains described polypropylene pipe.
Wherein, in step 1, the barrel zone temperature carried out when fusion plastification is extruded is respectively: one section 180 DEG C, two sections 180 DEG C, three sections 190 DEG C, and four sections 190 DEG C, die head temperature is respectively 1-5 section: 190 DEG C, 6-8 section 200 DEG C.
See Fig. 3, in a step 102, adopt the first cooling water tank 6 that described tubing is carried out sizing cooling, wherein, described first cooling water tank 6 length is 2 meters, and the water temperature in the first cooling water tank 6 is 15-23 DEG C, and the gait of march of tubing in the first cooling water tank 6 is 15m/min.
In step 103, adopt infrared heating device 9 to carry out on-line heating to described tubing, infrared heating segment length is 1.2 meters.
Wherein, as shown in Figure 2, it comprises the heating chamber be made up of multiple infrared heating pipe 1 circular array to an embodiment of infrared heating device 9, and the cavity 2 that multiple infrared heating pipe 1 surrounds passes through for tubing.Infrared heating device also comprises the support 3 be arranged on below multiple infrared heating pipe, is provided with controller 4 in support 3, and multiple infrared heating pipe 1 upper outside is provided with over cap 5.The heating power of infrared heating pipe is controlled by controller, when tubing passes through from the cavity that infrared heating pipe surrounds, on-line heating is carried out in the infrared mutual-tube material outside that infrared heating pipe sends, the object of the internal stress that the inside and outside temperature difference reaching reduction tubing causes.
As shown in Figure 3, at step 104, adopt cooler bin 7 again to cool described tubing, the constant temperature air-flow that described tubing row in described cooler bin 7 cooled or passed in cooler bin 60-80 DEG C naturally cools.In order to realize better cooling, described cooler bin 7 has multistage, preferably has 2-4 joint, with 3 joints for good.In the embodiment shown in fig. 3, cooler bin 7 is made up of first segment cooler bin 71, second section cooler bin 72 and Section of three cooler bin 73 respectively, and often saving cooler bin length is 4-5 rice.
As shown in Figure 3, after cooler bin 7, the second cooling water tank 8 is also provided with; Described tubing enters after cooling in cooler bin 7 in second cooling water tank 8 again and completes final cooling, and the water temperature in the second cooling water tank 8 is 20-35 DEG C.
Preferably, also comprise after step 104:
Step 105: the described polypropylene pipe obtained is cut into preset length, and the tubing after cutting is carried out at wire wrapping.
Polypropylene pipe burning optimization on line production method of the present invention has following characteristics:
1, compared with common PPR pipe processing technology, invention increases the temperature of machine barrel and the temperature of die head, make tubing inner surface after experience vacuum sizing still can keep higher temperature.
2, original whole piece tube extruding equipment is 4 joint coolings, and the cooling section of whole piece equipment is 25 meters, and for ensureing online thermal annealing tubing line duration, the present invention increases by a joint cooler bin, makes the cooling extended length of whole piece equipment to 35 meters.
3, the type of cooling is dipped into existing First Five-Year Plan section immersion cooling completely by original tubing, and tubing carries out nature cooling or vapours constant temperature in 234 joint cooler bins, reduces cooling velocity, improves the degree of crystallinity of tubing;
4, described infra-red heat treatment facility is the firing equipment be made up of 20 infrared lamps, after this equipment is positioned over the cooling of first segment vacuum sizing, before entering second segment cooling.
Below by specific embodiment, production method of the present invention and effect are described in detail.The PPR raw material of following examples to the hot water pipe of below D32 and the different trade mark can be used.All embodiments are all implemented at import PPR pipe device fabrication line, and the screw slenderness ratio of tubing equipment is 30:1.Implementing tubing production specification is the hot water pipe of S3.2PPR.
Embodiment 1: (Daqing Refinery company produces tubing specification: D20*2.8 by PPR raw material, trade mark PA14D) carry out material loading by vacuum intake feeding system, tubing is extruded after crystal formation fusion plastification in twin-screw, described barrel zone temperature, die head temperature are compared with common PPR production technology, and temperature improves 10-15 degree.Barrel zone temperature is respectively: one section 180 DEG C, two sections 180 DEG C, three sections 190 DEG C, and four sections 190 DEG C, described die head temperature is respectively 1-5 section: 190 DEG C, 6-8 section 200 DEG C.Subsequently tubing is carried out vacuum sizing cooling with the speed of production of 15m/min by the first cooling water tank 6, this first cooling water tank 6 length is 2 meters, the hydromining chilled water in the first cooling water tank 6, and water temperature is 15-23 DEG C.Opened by infrared heating device 9, carry out adjustment add heat by watt level, power is adjusted to the 60-85% of maximum (being generally 50 kilowatts), and whole infrared heating segment length is 1.2 meters.Then tubing is passed into first, second and third joint cooler bin 71,72,73, closes cooling water and carry out nature cooling or in cooler bin 7, pass into the constant temp. heating air-flow of 60-80 DEG C.First, second and third described joint cooler bin 71,72,73 length is 20 meters altogether.The water temperature finally passed through in the second cooling water tank 8, second cooling water tank 8 by tubing is 20-35 DEG C.Tubing carries out the cutting of 4 meters/section after the second cooling water tank 8, places the online packaging facilities of tubing, carry out at wire wrapping tubing after hauling machine.
Embodiment 2: (Yanshan Petrochemical company produces tubing specification: D20*2.8 by PPR raw material, trade mark C4220) carry out material loading by vacuum intake feeding system, tubing is extruded after crystal formation fusion plastification in twin-screw, described barrel zone temperature, die head temperature are compared with common PPR production technology, and temperature improves 10-15 degree.Barrel zone temperature is respectively: one section 180 DEG C, two sections 180 DEG C, three sections 190 DEG C, and four sections 190 DEG C, described die head temperature is respectively 1-5 section: 190 DEG C, 6-8 section 200 DEG C.Subsequently tubing is carried out vacuum sizing cooling with the speed of production of 15m/min by the first cooling water tank 6, this first cooling water tank 6 length is 2 meters, the hydromining chilled water in the first cooling water tank 6, and water temperature is 20 DEG C.Opened by infrared heating device 9, carry out adjustment by watt level and add heat, power is adjusted to the 70-75% of maximum again, and whole infrared heating segment length is 1.2 meters.Then tubing is passed into first, second and third joint cooler bin 71,72,73, when room temperature is greater than 23 DEG C, closes cooling water and carry out nature cooling.First, second and third described joint cooler bin 71,72,73 total length is 25 meters.The water temperature finally passed through in the second cooling water tank 8, second cooling water tank 8 by tubing is 20-35 DEG C.Tubing carries out the cutting of 4 meters/section after the second cooling water tank 8, places the online packaging facilities of tubing, carry out at wire wrapping tubing after hauling machine.
Embodiment 3: (Yanshan Petrochemical company produces tubing specification: D25*3.5 by PPR raw material, trade mark C4220) carry out material loading by vacuum intake feeding system, tubing is extruded after crystal formation fusion plastification in twin-screw, described barrel zone temperature, die head temperature are compared with common PPR production technology, and temperature improves 10-15 degree.Barrel zone temperature is respectively: one section 180 DEG C, two sections 180 DEG C, three sections 190 DEG C, and four sections 190 DEG C, described die head temperature is respectively 1-5 section: 190 DEG C, 6-8 section 200 DEG C.Subsequently tubing is carried out vacuum sizing cooling with the speed of production of 11m/min by the first cooling water tank 6, this first cooling water tank 6 length is 2 meters, the hydromining chilled water in the first cooling water tank 6, and water temperature is 20 DEG C.Opened by infrared heating device 9, carry out adjustment by watt level and add heat, power is adjusted to the 75-80% of maximum again, and whole infrared heating segment length is 1.2 meters.Then tubing is passed into first, second and third joint cooler bin 71,72,73, when room temperature is greater than 23 DEG C, it is cold that closedown cooling water carries out nature.First, second and third described joint cooler bin 71,72,73 total length is 25 meters.The water temperature finally passed through in the second cooling water tank 8, second cooling water tank 8 by tubing is 20-35 DEG C.Tubing carries out 4 meters of/section of cuttings after the second cooling water tank 8, places the online packaging facilities of tubing, carry out at wire wrapping tubing after hauling machine.
Embodiment 4: (Yanshan Petrochemical company produces tubing specification: D32*4.4 by PPR raw material, trade mark C4220) carry out material loading by vacuum intake feeding system, tubing is extruded after crystal formation fusion plastification in twin-screw, described barrel zone temperature, die head temperature are compared with common PPR production technology, and temperature improves 10-15 degree.Barrel zone temperature is respectively: one section 180 DEG C, two sections 180 DEG C, three sections 190 DEG C, and four sections 190 DEG C, described die head temperature is respectively 1-5 section: 190 DEG C, 6-8 section 200 DEG C.Subsequently tubing is carried out vacuum sizing cooling with the speed of production of 8m/min by the first cooling water tank 6, this first cooling water tank 6 length is 2 meters, the hydromining chilled water in the first cooling water tank 6, and water temperature is 20 DEG C.Opened by infrared heating device 9, carry out adjustment by watt level and add heat, power is adjusted to the 80-85% of maximum again, and whole infrared heating segment length is 1.2 meters.Then tubing is passed into first, second and third joint cooler bin 71,72,73, when room temperature is greater than 23 DEG C, closes cooling water and carry out nature cooling.First, second and third described joint cooler bin 71,72,73 total length is 25 meters.The water temperature finally passed through in the second cooling water tank 8, second cooling water tank 8 by tubing is 20-35 DEG C.Tubing carries out the cutting of 4 meters/section after the second cooling water tank 8, places the online packaging facilities of tubing, carry out at wire wrapping tubing after hauling machine.
The tubing utilizing production method of the present invention to produce is smooth, product meets the requirement of standard GB/T/T18742 to pipe performance, compared with common PPR pipe production technology, this technology effective overcome tubing in the fabrication process stress concentrate the shortcoming of the hydraulic performance decline caused, also effectively improve the hydraulic pressure strength of tubing simultaneously, improve the shortcoming of the PPR pipe low-temperature impact difference existed in industry.Tubing after burning optimization on line 0 DEG C of impact strength is by original 3.1KJ/M
2bring up to 6.5KJ/M
2, 23 DEG C of impact strengths are by original 22KJ/M
2bring up to existing 58.6KJ/M
2.The low temperature resistant cracking of tubing drop hammer index also by original without intact to existing 5/20 intact.No matter the hydraulic pressure strength time of tubing is that pressure-resistant time all improves more than 1 times at 20 DEG C or at 95 DEG C.Shown in the properties table one specific as follows of the tubing utilizing production method of the present invention to produce, table two and table three:
Table one: mechanical property
| Project | Conventional PPR | Burning optimization on line PPR |
| 0 DEG C of impact strength (KJ/M 2) | 3.1 | 6.5 |
| 23 DEG C of impact strength (KJ/M 2) | 22.0 | 58.6 |
| Elongation at break (100%) | 514.2 | 542.0 |
Table two: low temperature resistant cracking tubing drop impact performance
Table three: hydraulic performance
From the performance parameter in above each table, compared with prior art, various aspects of performance has all had very large lifting to the tubing that production method of the present invention is produced.
By adopting above-mentioned technology, compare with prior art, tool of the present invention has the following advantages:
1, under the prerequisite not affecting tubing production efficiency, compared with traditional technique, improve and melt extrude temperature 10-30 DEG C, tubing can be made after experience vacuum cooled sizing still to keep higher temperature.
2, tubing is because the type of cooling causes tubing external refrigeration fast for spraying or soaking in process, and the phenomenon that internal cooling is slow, makes tubing ectonexine produce thermograde large, there is irregular thermal stress, reduce the hydraulic pressure strength of tubing; The present invention carries out burning optimization on line to tubing, the internal stress that the inside and outside temperature difference reducing tubing causes by adding infra red heating device after vacuum sizing cooling.
3, traditional roll off the production line after adopt baking oven heat treatment method to produce tubing cost be 150 yuan/ton, use burning optimization on line technology of the present invention can be effectively cost-saving, about cost-saved 100 yuan/ton of tubing per ton, remarkable in economical benefits.
4, with adopt compared with the heat treated production method of baking oven after existing rolling off the production line, use burning optimization on line technology tubing of the present invention to be heated evenly, stable performance.
What 5, use burning optimization on line technology of the present invention to decrease to cause because of drying room accounts for floor area, and decrease a procedure, also can reduce recruitment quantity, therefore cost also reduces greatly simultaneously.
6, burning optimization on line production method of the present invention effectively can be connected with the online packing technique of tubing, accelerates automated production, enhances productivity.
7, traditional roll off the production line after heat treatment technics owing to processing 3-4 hour under the condition of 100-120 DEG C, the outer surface of tubing is oxidized, make tubing at welding process outer surface skin effect phenomenon, affect welding quality, burning optimization on line of the present invention can not cause the oxidation of pipe outer surface, therefore can effectively solve welding skin effect phenomenon.
The above embodiment is only that protection scope of the present invention is not limited thereto in order to absolutely prove the preferred embodiment that the present invention lifts.The equivalent alternative or conversion that those skilled in the art do on basis of the present invention, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (10)
1. a polypropylene pipe burning optimization on line production method, is characterized in that, comprises the following steps:
A, atactic copolymerized polypropene raw material is carried out fusion plastification after extrude formation tubing;
B, described tubing is carried out sizing cooling;
C, on-line heating is carried out to the cooled tubing of sizing;
D, the tubing after on-line heating to be cooled again, obtain described polypropylene pipe.
2. polypropylene pipe burning optimization on line production method as claimed in claim 1, it is characterized in that, in described steps A, the barrel zone temperature carried out when fusion plastification is extruded is respectively: one section 180 DEG C, two sections 180 DEG C, three sections 190 DEG C, four sections 190 DEG C, die head temperature is respectively 1-5 section: 190 DEG C, 6-8 section 200 DEG C.
3. polypropylene pipe burning optimization on line production method as claimed in claim 1, it is characterized in that, in described step B, adopt the first cooling water tank that described tubing is carried out sizing cooling, wherein, described first cooling water tank length is 2 meters, and the water temperature in the first cooling water tank is 15-23 DEG C, and the gait of march of tubing in the first cooling water tank is 15m/min.
4. polypropylene pipe burning optimization on line production method as claimed in claim 1, is characterized in that, in described step C, adopt infrared heating device to carry out on-line heating to described tubing, infrared heating segment length is 1.2 meters.
5. polypropylene pipe burning optimization on line production method as claimed in claim 4, it is characterized in that, described infrared heating device is formed by multiple infrared heating pipe circular array, and the chamber portion that multiple described infrared heating pipe surrounds passes through for described tubing.
6. polypropylene pipe burning optimization on line production method as claimed in claim 5; it is characterized in that; described infrared heating device also comprises the support be arranged on below multiple infrared heating pipe, is provided with controller in described support, and described multiple infrared heating pipe upper outside is provided with over cap.
7. polypropylene pipe burning optimization on line production method as claimed in claim 1, it is characterized in that, in described step D, adopt cooler bin again to cool described tubing, described tubing naturally cools in described cooler bin or the constant temperature air-flow that passes into 60-80 DEG C in cooler bin cools.
8. polypropylene pipe burning optimization on line production method as claimed in claim 7, it is characterized in that, described cooler bin has multistage.
9. polypropylene pipe burning optimization on line production method as claimed in claim 7 or 8, is characterized in that, be also provided with the second cooling water tank after described cooler bin; Enter in the second cooling water tank after described tubing cools in cooler bin again and complete final cooling, the water temperature in described second cooling water tank is 20-35 DEG C.
10. polypropylene pipe burning optimization on line production method as claimed in claim 1, is characterized in that, also comprise after described step D:
E, the described polypropylene pipe obtained is cut into preset length, and the tubing after cutting is carried out at wire wrapping.
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Inventor after: Jin Hongyang Inventor after: Feng Jinmao Inventor after: Gao Li Inventor after: Jiang Jianping Inventor after: Hu Zhenghua Inventor before: Feng Jinmao Inventor before: Gao Li Inventor before: Jiang Jianping Inventor before: Hu Zhenghua |
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Application publication date: 20160106 |