CN109027522A - A kind of method of PPR feed pipe cladding insulating layer - Google Patents
A kind of method of PPR feed pipe cladding insulating layer Download PDFInfo
- Publication number
- CN109027522A CN109027522A CN201810845611.4A CN201810845611A CN109027522A CN 109027522 A CN109027522 A CN 109027522A CN 201810845611 A CN201810845611 A CN 201810845611A CN 109027522 A CN109027522 A CN 109027522A
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- China
- Prior art keywords
- ppr
- insulating layer
- adhesive
- feed pipe
- component
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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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
Abstract
The technical field of PPR feed pipe process units of the present invention, more specifically, it is related to a kind of method of PPR feed pipe cladding insulating layer, includes the steps that the step of extrusion PPR pipe, adhesive layer the step of PPR pipe outer wall coats adhesive layer, the step of adhesive layer periphery coats insulating layer and between PPR pipe and insulating layer solidify.On the outer wall that the present invention uses same production line that insulating layer is disposably coated on PPR feed pipe while producing PPR, simple production process saves production, transport, installation cost, and can assign PPR feed pipe with good cold-resistant thermal insulation property.
Description
Technical field
The present invention relates to the technical fields of PPR feed pipe process units, coat more particularly, to a kind of PPR feed pipe
The method of insulating layer.
Background technique
In China cold districts rural area, annual winter and spring are all that there is a phenomenon where bursting by freezing boosters for water supply and sewerage pipeline
Peak period, this brings very big puzzlement to the production and living of peasant.Villages and small towns feedwater piping freezes booster and is primarily due to
1. villages and small towns pipeline is in winter in the case where intermittent water application, water temperature can be reduced, and when water temperature is lower than zero degree, will be frozen in pipeline
Frost heave, leading to pipeline, deformation occurs or rupture；2. Pipeline Ground receives various load actions, when level of ground water is gone up and down
Longitudinal bending stress can be generated, pipeline discontinuity is caused, so as to cause the fracture of pipeline.3. due to the shadow of Temperature Factor
It rings, the frost penetration in each place is different, and under normal circumstances, pipeline laying is in frozen soil line hereinafter, feedwater piping will not occur
Freezeout, and feedwater piping laying with frozen soil layer within when, easily freeze.The normal confession in rural area of this strong influence
Water brings great threat to villages and small towns feedwater piping normal operation.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of PPR feed pipe cladding insulating layer method,
On the outer wall that polyurethane heat insulation material is coated on PPR feed pipe while producing PPR feed pipe, simple production process, energy
Enough improve the cold-resistant thermal insulation property of PPR feed pipe.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of method of PPR feed pipe cladding insulating layer is provided, comprising the following steps:
S1. under the action of the first single screw extrusion machine, the sizing of cooling and shaping device is squeezed out and passed through by the first mold and is led
Leading-in device draws to obtain PPR pipe；
S2. PPR pipe described in step S1 passes through the second mold, and second mold, which is connected with, goes out adhesive A for cold-extruded
Second single screw extrusion machine of component and the third single screw extrusion machine for going out adhesive B component for cold-extruded, by adhesive A group
Point, adhesive B component prepare adhesive mix in a second mold after be annularly applied to PPR pipe outer wall formation gluing
Oxidant layer；
S3. the PPR pipe that outer wall is coated with adhesive layer in step S2 passes through third mold, and the third mold connection is useful
In the 4th single screw extrusion machine for squeezing out insulating layer, insulating layer raw material is cooling fixed through the plasticizing of third single screw extrusion machine heating melting
Type is coated on the periphery of adhesive layer；
S4. it cuts to obtain the PPR pipe for being coated with insulating layer through cutter device, adhesive A component and adhesive B component solidify
Cohesive force is formed between PPR pipe and polyurethane insulation coating.
The method of PPR feed pipe cladding insulating layer of the invention will be protected while producing PPR using same production line
Warm layer is disposably coated on the outer wall of PPR feed pipe, simple production process, saves production, transport, installation cost, and can
PPR feed pipe is assigned with good cold-resistant thermal insulation property.
Preferably, in step S2, the adhesive is inorganic adhesive, and the inorganic adhesive is selected from silicate, phosphoric acid
One of salt, oxide, sulfate, borate or a variety of combinations.Inorganic adhesive use be able to solve PPR pipe with
The problem of combining between insulating layer, relative to high polymer adhesive, inorganic adhesive has nuisanceless, anti-aging, high temperature resistant,
The advantage that elevated temperature strength is big, shrinking percentage is small.
Preferably, the adhesive A component is cupric oxide powder, and the adhesive B component is phosphoric acid solution, the gluing
The proportion of agent component A and adhesive B component is 1:4 ~ 1:2.Copper oxide-phosphoric acid adhesive high temperature resistance is good, can be at 600 DEG C
It is used for a long time, moment is resistant to 800 DEG C ~ 1000 DEG C, will not deform because of the cladding of subsequent insulating layer.
Preferably, in step S4, the solidification of the adhesive A component and adhesive B component includes: first at 21 DEG C ~ 35 DEG C
Under the conditions of solidify 18h ~ for 24 hours, after 4h ~ 8h is kept under the conditions of 60 DEG C ~ 80 DEG C.Copper oxide-phosphoric acid adhesive is first in room temperature condition
Lower solidification reheats and solidifies after carrying out, and improves copper oxide-phosphoric acid adhesive curing degree, improves the mechanical property of adhesive layer；
And solidification temperature is low, it can energy saving.
Preferably, the adhesive layer with a thickness of 0.5mm ~ 2mm.The too thin bonding that cannot play of adhesive layer thickness is made
With the too thick easy mechanical strength for forming cohesive force and influencing adhesive layer.
Preferably, the screw speed of second single screw extrusion machine is 25r/min ~ 35r/min, the third single screw rod
The screw speed of extruder is 40r/min ~ 60r/min.The screw speed of second single screw extrusion machine, third single screw extrusion machine
Can be adjusted according to the thickness of required adhesive layer, the second single screw extrusion machine, third single screw extrusion machine screw speed it
Between relationship according to adhesive A component, the proportion of adhesive B component set.
Preferably, the 4th single screw extrusion machine includes the feed zone being sequentially arranged, metering section, compression section and homogenizing
Section, the temperature of the feed zone are 175 DEG C ~ 190 DEG C, and the temperature of metering section is 190 DEG C ~ 210 DEG C, and the temperature of compression section is 190
DEG C ~ 210 DEG C, the temperature of homogenizing zone is 205 DEG C ~ 220 DEG C.Insulating layer is processed to obtain frequently with thermoplastic elastomer (TPE), in order to guarantee
It can sufficiently be plasticized, while the viscosity of product surface can be reduced to the maximum extent again, above-mentioned feed zone, metering section, compression are set
Section, the temperature of homogenizing zone.
Preferably, insulating layer raw material through four screw extruder before squeezing out, the drying steps including insulating layer raw material；
The temperature that the drying steps use is 95 DEG C ~ 110 DEG C, time for using for 2h ~ 4h.Moisture in thermoplastic elastomer (TPE) can make
Thermoplastic elastomer (TPE) melt generates reduction in barrel, influences the mechanical performance and appearance of processing performance and product, thus into
It must be dried before the processing of row basis；Drying temperature is different because of hardness difference, generally between 95-110 DEG C, the time 3 hours
Left and right.
Preferably, in step S3, the insulating layer raw material is polyurethane thermoplastic bullet of the molecular weight between 70,000 ~ 100,000
Property body.Molecular weight is too small, and the mechanical performance for the insulating layer processed cannot be guaranteed；Molecular weight is too big, it is difficult to extrusion molding.
Preferably, in step S3, polyurethane termoplastic elastomer is in pelletized form or sheet.Granular or sheet-shaped material is easy to early period
It is abundant dry and be conducive to machine-shaping.
Compared with prior art, the beneficial effects of the present invention are:
The method of PPR feed pipe cladding insulating layer of the invention, using same production line by insulating layer while producing PPR
It is disposably coated on the outer wall of PPR feed pipe, simple production process, saves production, transport, installation cost, and can assign
PPR feed pipe is with good cold-resistant thermal insulation property.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that PPR feed pipe of the invention coats insulating layer.
Fig. 2 is the structural schematic diagram for coating the PPR feed pipe of insulating layer.
In attached drawing: the first mold of 1-；2-PPR tubing；The second mold of 3-；4- adhesive layer；5- third mold；6- heat preservation
Layer.
Specific embodiment
The present invention is further illustrated With reference to embodiment.Wherein, attached drawing only for illustration,
What is indicated is only schematic diagram, rather than pictorial diagram, should not be understood as the limitation to this patent；Reality in order to better illustrate the present invention
Example is applied, the certain components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；To those skilled in the art
For, the omitting of some known structures and their instructions in the attached drawings are understandable.
Embodiment one
The first embodiment of the method for insulating layer, including following step are coated for PPR feed pipe of the invention as shown in Figure 1 to Figure 2
It is rapid:
A kind of method of PPR feed pipe cladding insulating layer is provided, comprising the following steps:
S1. under the action of the first single screw extrusion machine, pass through the first mold 1 squeeze out and by cooling and shaping device sizing and
Traction device draws to obtain PPR pipe 2；
S2. PPR pipe 2 described in step S1 passes through the second mold 3, and second mold 3, which is connected with, goes out gluing for cold-extruded
Second single screw extrusion machine of agent component A and the third single screw extrusion machine for going out adhesive B component for cold-extruded, by adhesive
The adhesive that component A, adhesive B component are prepared annularly is applied to the outer wall shape of PPR pipe 2 after mixing in the second mold 3
At adhesive layer 4；
S3. the PPR pipe 2 that outer wall is coated with adhesive layer 4 in step S2 passes through third mold 5, and the third mold 5 connects
There is the 4th single screw extrusion machine for squeezing out insulating layer 6,6 raw material of insulating layer is plasticized through third single screw extrusion machine heating melting
Cooling and shaping is coated on the periphery of adhesive layer 4；
S4. it cuts to obtain the PPR pipe 2 for being coated with insulating layer 6 through cutter device, adhesive A component and adhesive B component are solid
Change forms cohesive force between PPR pipe 2 and polyurethane insulation coating 6.
The adhesive of the present embodiment is copper oxide-phosphoric acid adhesive, and adhesive A component is cupric oxide powder, adhesive B group
It is divided into phosphoric acid solution, the proportion of adhesive A component and adhesive B component is 1:2；6 raw material of insulating layer of the present embodiment is molecule
Measure the polyurethane termoplastic elastomer between 70,000 ~ 100,000；And the outer diameter of the PPR pipe 2 of the present embodiment is 20mm, is coated on
The adhesive layer 4 of 2 outer wall of PPR pipe with a thickness of 1mm, be coated on the insulating layer 6 of 4 periphery of adhesive layer with a thickness of 5mm.This
The technological parameter of each step of embodiment is as follows: traction device is set to the side of the 4th single screw extrusion machine, the traction of traction device
Speed is 10m/min ~ 15m/min, and the screw speed of the second single screw extrusion machine is 25r/min ~ 35r/min；Third single screw rod
The screw speed of extruder is 40r/min ~ 60r/min；4th single screw extrusion machine includes the feed zone being sequentially arranged, metering
Section, compression section and homogenizing zone, the temperature of the feed zone are 175 DEG C ~ 190 DEG C, and the temperature of metering section is 190 DEG C ~ 210 DEG C,
The temperature of compression section is 190 DEG C ~ 210 DEG C, and the temperature of homogenizing zone is 205 DEG C ~ 220 DEG C；The screw rod of 4th single screw extrusion machine turns
Speed is 40 r/min ~ 60r/min.
Embodiment two
The present embodiment is similar with embodiment one, institute the difference is that, the outer diameter of the PPR pipe 2 of the present embodiment is 75mm, cladding
2 outer wall of PPR pipe adhesive layer 4 with a thickness of 1mm, be coated on the insulating layer 6 of 4 periphery of adhesive layer with a thickness of 7mm.
The technological parameter of each step of the present embodiment is as follows: traction device is set to the side of the 4th single screw extrusion machine, and traction device is led
Drawing speed is 7m/min ~ 8m/min, and the screw speed of the second single screw extrusion machine is 40r/min ~ 50r/min；Third single screw rod
The screw speed of extruder is 80r/min ~ 90r/min；4th single screw extrusion machine includes the feed zone being sequentially arranged, metering
Section, compression section and homogenizing zone, the temperature of the feed zone are 175 DEG C ~ 190 DEG C, and the temperature of metering section is 190 DEG C ~ 210 DEG C,
The temperature of compression section is 190 DEG C ~ 210 DEG C, and the temperature of homogenizing zone is 205 DEG C ~ 220 DEG C；The screw rod of 4th single screw extrusion machine turns
Speed is 40 r/min ~ 60r/min.
Embodiment three
The present embodiment is similar with embodiment one, institute the difference is that, the outer diameter of the PPR pipe 2 of the present embodiment is 90mm, cladding
2 outer wall of PPR pipe adhesive layer 4 with a thickness of 2mm, be coated on the insulating layer 6 of 4 periphery of adhesive layer with a thickness of
10mm.The technological parameter of each step of the present embodiment is as follows: traction device is set to the side of the 4th single screw extrusion machine, traction device
Hauling speed be 4m/min ~ 6m/min, the screw speed of the second single screw extrusion machine is 70r/min ~ 90r/min；Third list
The screw speed of screw extruder is 100r/min ~ 120r/min；4th single screw extrusion machine include the feed zone being sequentially arranged,
Metering section, compression section and homogenizing zone, the temperature of the feed zone are 175 DEG C ~ 190 DEG C, and the temperature of metering section is 190 DEG C ~ 210
DEG C, the temperature of compression section is 190 DEG C ~ 210 DEG C, and the temperature of homogenizing zone is 205 DEG C ~ 220 DEG C；The screw rod of 4th single screw extrusion machine
Revolving speed is 40 r/min ~ 60r/min.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (10)
1. a kind of method of PPR feed pipe cladding insulating layer, which comprises the following steps:
S1. under the action of the first single screw extrusion machine, the sizing of cooling and shaping device is squeezed out and passed through by the first mold and is led
Leading-in device draws to obtain PPR pipe；
S2. PPR pipe described in step S1 passes through the second mold, and second mold, which is connected with, goes out adhesive A for cold-extruded
Second single screw extrusion machine of component and the third single screw extrusion machine for going out adhesive B component for cold-extruded, by adhesive A group
Point, adhesive B component prepare adhesive mix in a second mold after be annularly applied to PPR pipe outer wall formation gluing
Oxidant layer；
S3. the PPR pipe that outer wall is coated with adhesive layer in step S2 passes through third mold, and the third mold connection is useful
In the 4th single screw extrusion machine for squeezing out insulating layer, insulating layer raw material is cooling fixed through the plasticizing of third single screw extrusion machine heating melting
Type is coated on the periphery of adhesive layer；
S4. it cuts to obtain the PPR pipe for being coated with insulating layer through cutter device, adhesive A component and adhesive B component solidify
Cohesive force is formed between PPR pipe and polyurethane insulation coating.
2. the method for PPR feed pipe cladding insulating layer according to claim 1, which is characterized in that in step S2, the glue
Glutinous agent is inorganic adhesive, and the inorganic adhesive is selected from one of silicate, phosphate, oxide, sulfate, borate
Or a variety of combination.
3. the method for PPR feed pipe cladding insulating layer according to claim 2, which is characterized in that the adhesive A component
For cupric oxide powder, the adhesive B component is phosphoric acid solution, and the proportion of the adhesive A component and adhesive B component is 1:
4~1:2。
4. the method for PPR feed pipe cladding insulating layer according to claim 3, which is characterized in that in step S4, the glue
The solidification of glutinous agent component A and adhesive B component includes: first to solidify 18h ~ for 24 hours under the conditions of 21 DEG C ~ 35 DEG C, after at 60 DEG C ~ 80 DEG C
Under the conditions of keep 4h ~ 8h.
5. the method for PPR feed pipe cladding insulating layer according to any one of claims 1 to 4, which is characterized in that the glue
Adhensive layer with a thickness of 0.5mm ~ 2mm.
6. the method for PPR feed pipe cladding insulating layer according to claim 5, which is characterized in that second single screw rod
The screw speed of extruder is 25r/min ~ 35r/min, the screw speed of the third single screw extrusion machine be 40 r/min ~
60r/min。
7. the method for PPR feed pipe according to claim 1 cladding insulating layer, which is characterized in that in step S3, described the
Four single screw extrusion machines include the feed zone being sequentially arranged, metering section, compression section and homogenizing zone, and the temperature of the feed zone is
175 DEG C ~ 190 DEG C, the temperature of metering section is 190 DEG C ~ 210 DEG C, and the temperature of compression section is 190 DEG C ~ 210 DEG C, the temperature of homogenizing zone
It is 205 DEG C ~ 220 DEG C.
8. the method for PPR feed pipe cladding insulating layer according to claim 7, which is characterized in that in step S3, insulating layer
Raw material through four screw extruder before squeezing out, the drying steps including insulating layer raw material；The temperature that the drying steps use
Degree is 95 DEG C ~ 110 DEG C, time for using is 2h ~ 4h.
9. the method for PPR feed pipe cladding insulating layer according to claim 1, which is characterized in that in step S3, the guarantor
Warm layer raw material is polyurethane termoplastic elastomer of the molecular weight between 70,000 ~ 100,000.
10. the method for PPR feed pipe cladding insulating layer according to claim 9, which is characterized in that in step S3, poly- ammonia
Ester thermoplastic elastomer (TPE) is in pelletized form or sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810845611.4A CN109027522B (en) | 2018-07-27 | 2018-07-27 | Method for coating heat-insulating layer on PPR water supply pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810845611.4A CN109027522B (en) | 2018-07-27 | 2018-07-27 | Method for coating heat-insulating layer on PPR water supply pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109027522A true CN109027522A (en) | 2018-12-18 |
| CN109027522B CN109027522B (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810845611.4A Active CN109027522B (en) | 2018-07-27 | 2018-07-27 | Method for coating heat-insulating layer on PPR water supply pipe |
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2018
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