CA2356451A1 - The insulation metal pipe with foaming plastic cover and its manufacture process - Google Patents
The insulation metal pipe with foaming plastic cover and its manufacture process Download PDFInfo
- Publication number
- CA2356451A1 CA2356451A1 CA002356451A CA2356451A CA2356451A1 CA 2356451 A1 CA2356451 A1 CA 2356451A1 CA 002356451 A CA002356451 A CA 002356451A CA 2356451 A CA2356451 A CA 2356451A CA 2356451 A1 CA2356451 A1 CA 2356451A1
- Authority
- CA
- Canada
- Prior art keywords
- metal pipe
- plastic
- mould
- foaming
- protection
- Prior art date
- 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.)
- Abandoned
Links
Classifications
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
- B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
- B29C44/322—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables
- B29C44/324—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables the preformed parts being tubular or folded to a tubular shape
-
- 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
-
- 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
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/151—Coating 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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
-
- 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
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/143—Pre-insulated pipes
-
- 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
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- 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
-
- 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
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
-
- 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
- B29K2055/00—Use of specific polymers obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of main groups B29K2023/00 - B29K2049/00, e.g. having a vinyl group, as moulding material
- B29K2055/02—ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
One type of metal pipe with plastic foaming consists of metal pipe, plastic foaming layer and plastic protection layer from inside to outside. It is produced by extruder. The extruder extrudes the foaming layer and the protection which are pressed onto the metal pipe by compound mould, the product is completed immediately. The invention has the advantages in: good insulation, moisture-proof, flame-proof, stable quality, and long life of usage. With use of this pipe, the installation time of insulation pipe will be shortened, and the force of labors will be reduced.
Description
Description of Patent The insulation metal pipe with foaming plastic cover and its manufacture process This invention involves with metal pipe, especially one type of insulation metal pipe with foaming plastic cover.
The existing insulation of metal pipe is usually done by wrapping the insulation material manually on the metal pipe or putting it on the surface of metal pipe, finally wrapping the protection cloth outside of insulation material. It costs a lot of manpower, material resources. Not only does it require big labour forces, but also arouses the problem of safety. The material waste is often occurred by improper manual operation, and the effect of insulation is also affected, which caused the loss on economics and energy resource. The economic loss is also often caused by improper use of material or malfunction of the protection layer.
There is one metal pipe with plastic warping protection, but this structure still can not reach the good insulation effect. The metal pipe with manual insulation is with low strength, easy damaged, poor insulation effect, because of the foaming exposures outside.
The purpose of this invention is to overcome the above shortages, to provide the insulation metal pipe with foaming plastic cover, to create the conditions of large scale commercial production.
The metal pipe with foaming plastic cover, consists of metal pipe, plastic foaming layer and plastic protection layer from inside to outside.
The said metal pipe could be all types of metal pipes or metal hoses The said plastic foaming layer has the main raw materials such as polyvinyl chloride (PVC), polystyrene, polyethylene, polyaminester, polypropylene, or acrylonitrile-butadiene-styrene copolymer, or copolymer of ethylene-vinyl acetate.
The raw materials of plastic protection layer could be polyvinyl chloride (PVC), polystyrene, polyethylene, polyaminester, polypropylene, or acrylonitrile-butadiene-styrene copolymer, or copolymer of ethylene-vinyl acetate.
The manufacture process of metal pipe with said foaming plastic cover includes the following steps:
1 ) the surface treatment, removing of mud, dust and grease.
The existing insulation of metal pipe is usually done by wrapping the insulation material manually on the metal pipe or putting it on the surface of metal pipe, finally wrapping the protection cloth outside of insulation material. It costs a lot of manpower, material resources. Not only does it require big labour forces, but also arouses the problem of safety. The material waste is often occurred by improper manual operation, and the effect of insulation is also affected, which caused the loss on economics and energy resource. The economic loss is also often caused by improper use of material or malfunction of the protection layer.
There is one metal pipe with plastic warping protection, but this structure still can not reach the good insulation effect. The metal pipe with manual insulation is with low strength, easy damaged, poor insulation effect, because of the foaming exposures outside.
The purpose of this invention is to overcome the above shortages, to provide the insulation metal pipe with foaming plastic cover, to create the conditions of large scale commercial production.
The metal pipe with foaming plastic cover, consists of metal pipe, plastic foaming layer and plastic protection layer from inside to outside.
The said metal pipe could be all types of metal pipes or metal hoses The said plastic foaming layer has the main raw materials such as polyvinyl chloride (PVC), polystyrene, polyethylene, polyaminester, polypropylene, or acrylonitrile-butadiene-styrene copolymer, or copolymer of ethylene-vinyl acetate.
The raw materials of plastic protection layer could be polyvinyl chloride (PVC), polystyrene, polyethylene, polyaminester, polypropylene, or acrylonitrile-butadiene-styrene copolymer, or copolymer of ethylene-vinyl acetate.
The manufacture process of metal pipe with said foaming plastic cover includes the following steps:
1 ) the surface treatment, removing of mud, dust and grease.
2) The make up of the plastic foaming raw material, mixed up in the extruder, heated and melted, foaming;
3) The make up of raw material for plastic protection, mixed in the extruder, heated and melted;
4) Preheating of metal pipe;
5) The extruder extrudes the melted plastic foaming, and compound onto the surface of metal pipe.
6) The extruder extrudes the melted plastic protection, and compound with the plastic foaming;
7) Cooling and finalizing.
The above steps of 4, 5, and 6 are produced in the compound mould at the first time.
J
The compound mould are composed of lock nut, mandrel, mould parent, machine neck-first, large aperture mould, lock net, mandrel, sleeve body, small aperture mould, machine neck and heater , and connected by screw and adjust screw. The mould stream is formed among mould parent , machine neck , mandrill , large aperture mould, and S2 stream is formed among sleeve body, machine neck and large aperture mould.
The said metal pipe is melted under preheating, and the foaming plastic is conducted into the streams of mould S1 through machine neck by extruder, the melted plastic protection is conducted into the stream of mould S2, and compound with metal pipe at the outlet, to become the completed product at the first time.
The further description is given based on the figures attached.
Figure 1 is the structure drawing of the insulation metal pipe with plastic foaming cover.
Figure 2 is the structure cutaway view of the compound mould for this invention.
In the drawing: 1-metal pipe; 2-heat prevention plastic foam; 3-protection 01-lock nut 02- mandrel 03- parent 04-machine neck 05- large aperture06- lock nut first 07-mandrel 08- sleeve body 09- small aperture mould 011-screw 012 -adjust screw013 -machine neck 014-adjust screw 015-heater The structure of the metal pipe is shown in Figure 1. The inner layer is metal pipe1, the middle is the plastic foaming layer2, the outer layer is plastic protection G
3. The said metal pipe can be the various types of metal pipes or metal hoses.
The main raw materials of the said plastic foaming can be polyvinyl chloride (PVC), polystyrene, polyethylene, polyaminester, polypropylene, or acrylonitrile-butadiene-styrene copolymer, or copolymer of ethylene-vinyl acetate. The main raw materials of the said plastic protection layer can use either of the following materials: polyvinyl chloride (PVC), polystyrene, polyethylene, polyaminester, polypropylene, or acrylonitrile-butadiene-styrene copolymer, or copolymer of ethylene-vinyl acetate. Of course, during selection of the raw materials for foaming and protection, it is expected that the melting temperatures of both are close. It is better if the materials are the same.
The manufacture process for the insulation metal pipe with plastic foaming includes the following steps:
The surface treatment of metal pipe for mud , dust and grease; the make up of the plastic foaming raw materials, mixed in the extruder, heated and melted, foaming; the make up of plastic protection raw materials, mixed in the extruder, heated and melted; preheating of metal pipe; the extruder extrudes the plastic foaming which is compounded onto the surface of metal pipe; the extruder extrudes the melted plastic protection, and compound with foaming plastic;
cooling and finalize.
The figure 2 is the structure cutaway view of the compound mould for this invention.
This compound mould consists of lock nut(01 ), mandrel(02), mould parent(03), machine neck-first(04), large aperture mould(05), lock net (06), mandrel(07), sleeve body (08), small aperture mould (09), machine neck (013) and heater (015) , and connected by screw (011 ) and adjust screw (012, 014). The mould stream is formed among mould parent (03), machine neck (04), mandrill (07), and large aperture mould (05), for foaming plastic moving through machine neck (04) press and S2 stream is formed by sleeve body (08), machine neck (013) and large aperture mould (05), for melted protection plastic moving through machine neck(013) press.
We will give one example to explain the feasibility and technical effects for this invention and manufacture process.
To select PVC as main raw material of foaming material, the recipe is as following:
Raw Material Gravity Ratio Stability Agent 10.2 Polyethylene Wax 1.3 Ozokerite 14 Stearic Acid Calcium 3.g Filling 6.3 Foaming Agent O.g Protection Layer (Select PVC as main raw material) Stability Agent 12.0 Polyethylene Wax 1.3 Ozokerite g,0 Stearic Acid Calcium 2.5 Plasticizer 1 g Filling 6.0
The above steps of 4, 5, and 6 are produced in the compound mould at the first time.
J
The compound mould are composed of lock nut, mandrel, mould parent, machine neck-first, large aperture mould, lock net, mandrel, sleeve body, small aperture mould, machine neck and heater , and connected by screw and adjust screw. The mould stream is formed among mould parent , machine neck , mandrill , large aperture mould, and S2 stream is formed among sleeve body, machine neck and large aperture mould.
The said metal pipe is melted under preheating, and the foaming plastic is conducted into the streams of mould S1 through machine neck by extruder, the melted plastic protection is conducted into the stream of mould S2, and compound with metal pipe at the outlet, to become the completed product at the first time.
The further description is given based on the figures attached.
Figure 1 is the structure drawing of the insulation metal pipe with plastic foaming cover.
Figure 2 is the structure cutaway view of the compound mould for this invention.
In the drawing: 1-metal pipe; 2-heat prevention plastic foam; 3-protection 01-lock nut 02- mandrel 03- parent 04-machine neck 05- large aperture06- lock nut first 07-mandrel 08- sleeve body 09- small aperture mould 011-screw 012 -adjust screw013 -machine neck 014-adjust screw 015-heater The structure of the metal pipe is shown in Figure 1. The inner layer is metal pipe1, the middle is the plastic foaming layer2, the outer layer is plastic protection G
3. The said metal pipe can be the various types of metal pipes or metal hoses.
The main raw materials of the said plastic foaming can be polyvinyl chloride (PVC), polystyrene, polyethylene, polyaminester, polypropylene, or acrylonitrile-butadiene-styrene copolymer, or copolymer of ethylene-vinyl acetate. The main raw materials of the said plastic protection layer can use either of the following materials: polyvinyl chloride (PVC), polystyrene, polyethylene, polyaminester, polypropylene, or acrylonitrile-butadiene-styrene copolymer, or copolymer of ethylene-vinyl acetate. Of course, during selection of the raw materials for foaming and protection, it is expected that the melting temperatures of both are close. It is better if the materials are the same.
The manufacture process for the insulation metal pipe with plastic foaming includes the following steps:
The surface treatment of metal pipe for mud , dust and grease; the make up of the plastic foaming raw materials, mixed in the extruder, heated and melted, foaming; the make up of plastic protection raw materials, mixed in the extruder, heated and melted; preheating of metal pipe; the extruder extrudes the plastic foaming which is compounded onto the surface of metal pipe; the extruder extrudes the melted plastic protection, and compound with foaming plastic;
cooling and finalize.
The figure 2 is the structure cutaway view of the compound mould for this invention.
This compound mould consists of lock nut(01 ), mandrel(02), mould parent(03), machine neck-first(04), large aperture mould(05), lock net (06), mandrel(07), sleeve body (08), small aperture mould (09), machine neck (013) and heater (015) , and connected by screw (011 ) and adjust screw (012, 014). The mould stream is formed among mould parent (03), machine neck (04), mandrill (07), and large aperture mould (05), for foaming plastic moving through machine neck (04) press and S2 stream is formed by sleeve body (08), machine neck (013) and large aperture mould (05), for melted protection plastic moving through machine neck(013) press.
We will give one example to explain the feasibility and technical effects for this invention and manufacture process.
To select PVC as main raw material of foaming material, the recipe is as following:
Raw Material Gravity Ratio Stability Agent 10.2 Polyethylene Wax 1.3 Ozokerite 14 Stearic Acid Calcium 3.g Filling 6.3 Foaming Agent O.g Protection Layer (Select PVC as main raw material) Stability Agent 12.0 Polyethylene Wax 1.3 Ozokerite g,0 Stearic Acid Calcium 2.5 Plasticizer 1 g Filling 6.0
8 Fire retardant 15.0 Ageing Resistant 3.3 pigment 0.2 The temperature of extruder casing is 150°C, the temperature of mould is 140°C, the turning speed of the screw stem is 45/min, the head pressure is 12 Mega-Pa, the traction speed of copper pipe is 5 m/second, under above operation parameters, the metal pipe with foaming plastic cover is made at the first time.
Through tests, the features and advantages of the insulation metal pipe with foaming plastic are:
(1) low heat conductivity, at the average temperature of 0 °C , the heat conductivity of the pipe is <0.03 w.m.k, only one-tenth of conductivity index for traditional insulation pipe; under the same circumstance, the amounts of insulation material needed for same insulation effect is decreased by more than 50%.
(2) Closed insulation layer, the moisture is hard to permeate to the material, not only to keep warm but also become moisture- proofed. Moisture-proofed factor ,5000.
(3) Because of fire retardant and preservative etc.added, the plastic protection layer is fire proofed, the 02 index is as high as 28; it is high preservative, the elongation strength , 10 mega Pa, the compressive strength and anti-damage strength are high, the life of usage ,30 years. It is suitable for using in building and relevant facilities.
(4) Easy installation, it will shorten the project schedule considerably, and can lower the manpower forces greatly.
Through tests, the features and advantages of the insulation metal pipe with foaming plastic are:
(1) low heat conductivity, at the average temperature of 0 °C , the heat conductivity of the pipe is <0.03 w.m.k, only one-tenth of conductivity index for traditional insulation pipe; under the same circumstance, the amounts of insulation material needed for same insulation effect is decreased by more than 50%.
(2) Closed insulation layer, the moisture is hard to permeate to the material, not only to keep warm but also become moisture- proofed. Moisture-proofed factor ,5000.
(3) Because of fire retardant and preservative etc.added, the plastic protection layer is fire proofed, the 02 index is as high as 28; it is high preservative, the elongation strength , 10 mega Pa, the compressive strength and anti-damage strength are high, the life of usage ,30 years. It is suitable for using in building and relevant facilities.
(4) Easy installation, it will shorten the project schedule considerably, and can lower the manpower forces greatly.
9 The advantages of this invention manufacture process:
(1)The heat prevention pipe can be produced commercially, and suitable for any insulation treatment of metal pipe. According to the insulation requirement, the process can be adjusted and the insulation thickness can be changed to meet the requirement of the market.
(2) The manual insulation of pipes has been changed to machine equipment, whose process parameters and performance are matched well, the quality is guaranteed.
(3) The manufacture process is reasonable, particular style in compound mould structure and shaping, three layers of material are produced into one compound product at the first time using plastic melted features, the product is stable.
(1)The heat prevention pipe can be produced commercially, and suitable for any insulation treatment of metal pipe. According to the insulation requirement, the process can be adjusted and the insulation thickness can be changed to meet the requirement of the market.
(2) The manual insulation of pipes has been changed to machine equipment, whose process parameters and performance are matched well, the quality is guaranteed.
(3) The manufacture process is reasonable, particular style in compound mould structure and shaping, three layers of material are produced into one compound product at the first time using plastic melted features, the product is stable.
Claims (8)
1. One type of metal pipe with plastic foam cover, has the feature of that there is plastic foam layer between the metal pipe and the protection.
2. The metal pipe with plastic foam cover stated in item 1 has the feature of that it can be all types of metal pipes or metal hoses.
3. The metal pipe with plastic foam cover stated in item 1 has the feature of that the main raw materials of plastic foam layer (2) can be polyvinyl chloride (PVC), polystyrene, polyethylene, polyaminester, polypropylene, or acrylonitrile-butadiene-styrene copolymer, or copolymer of ethylene-vinyl acetate.
4. The metal pipe with plastic foam cover has the feature of the main raw materials of the protection (3) can be polyvinyl chloride (PVC), polystyrene, polyethylene, polyaminester, polypropylene, or acrylonitrile-butadiene-styrene copolymer, or copolymer of ethylene-vinyl acetate.
5. According to the manufacture process for metal pipe with plastic foam as stated in item 1, the feature involves the following steps:
1)surface treatment of metal pipe: removal of mud, dust and grease;
2) the make-up of raw materials for plastic foam, mixing in the extruder, heat-melting, foaming;
3) the make-up of raw materials for the protection, mixing in the extruder, heat-melting;
4) pre-heating of metal pipe;
5) the extruder extrudes the melted plastic foams and compound onto the metal pipe;
6) the extruder extrudes the melted protection plastic, and compound onto the plastic foaming layer.
7) Cooling and finalize the design
1)surface treatment of metal pipe: removal of mud, dust and grease;
2) the make-up of raw materials for plastic foam, mixing in the extruder, heat-melting, foaming;
3) the make-up of raw materials for the protection, mixing in the extruder, heat-melting;
4) pre-heating of metal pipe;
5) the extruder extrudes the melted plastic foams and compound onto the metal pipe;
6) the extruder extrudes the melted protection plastic, and compound onto the plastic foaming layer.
7) Cooling and finalize the design
6. The manufacture process for metal pipe with plastic foaming as stated in item 5. has the feature of: the fourth, fifth, and sixth steps are completed in the compound mould at first time.
7. The manufacture process for metal pipe with plastic foaming as stated in item 6, has the features of the said compound mould consists of lock nut(01 ), mandrel(02), mould parent(03), machine neck-first(04), large aperture mould(05), lock net (06), mandrel(07), sleeve body (08), small aperture mould (09), machine neck (013) and heater (015) , and connected by screw (011 ) and adjust screw (012, 014). The mould stream is formed between mould parent (03), machine neck (04), mandrill (07), large aperture mould (05), and S2 stream is formed by sleeve body (08), machine neck (013) and large aperture mould (05).
8. The manufacture process for metal pipe with plastic foaming, has the feature of : the said metal pipe(1) is melted under preheating of heater(015), the plastic foaming is conducted into mould stream (S1) through machine neck(04) pressed by extruder. The melted plastic protection is also conducted into mould stream (S2) by extruder through machine neck (013), and compound onto the metal pipe at the mould outlet. The product of metal pipe(1) with plastic foaming layer(2) and plastic protection layer (3) is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002356451A CA2356451A1 (en) | 2001-08-22 | 2001-08-22 | The insulation metal pipe with foaming plastic cover and its manufacture process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002356451A CA2356451A1 (en) | 2001-08-22 | 2001-08-22 | The insulation metal pipe with foaming plastic cover and its manufacture process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2356451A1 true CA2356451A1 (en) | 2003-02-22 |
Family
ID=4169860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002356451A Abandoned CA2356451A1 (en) | 2001-08-22 | 2001-08-22 | The insulation metal pipe with foaming plastic cover and its manufacture process |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2356451A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009079784A1 (en) * | 2007-12-21 | 2009-07-02 | Shawcor Ltd. | Styrenic insulation for pipe |
| US8397765B2 (en) | 2008-07-25 | 2013-03-19 | Shawcor Ltd. | High temperature resistant insulation for pipe |
| US8485229B2 (en) | 2008-12-22 | 2013-07-16 | Shawcor Ltd. | Wrappable styrenic pipe insulations |
-
2001
- 2001-08-22 CA CA002356451A patent/CA2356451A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009079784A1 (en) * | 2007-12-21 | 2009-07-02 | Shawcor Ltd. | Styrenic insulation for pipe |
| US8714206B2 (en) | 2007-12-21 | 2014-05-06 | Shawcor Ltd. | Styrenic insulation for pipe |
| CN101903696B (en) * | 2007-12-21 | 2015-04-22 | 超科有限公司 | Styrenic insulation for pipe |
| US8397765B2 (en) | 2008-07-25 | 2013-03-19 | Shawcor Ltd. | High temperature resistant insulation for pipe |
| US8485229B2 (en) | 2008-12-22 | 2013-07-16 | Shawcor Ltd. | Wrappable styrenic pipe insulations |
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