CN1598384A - Metal pipe convered with foamed plastic for thermal insulation and its mfg. method - Google Patents
Metal pipe convered with foamed plastic for thermal insulation and its mfg. method Download PDFInfo
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- CN1598384A CN1598384A CN 03115932 CN03115932A CN1598384A CN 1598384 A CN1598384 A CN 1598384A CN 03115932 CN03115932 CN 03115932 CN 03115932 A CN03115932 A CN 03115932A CN 1598384 A CN1598384 A CN 1598384A
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- plastic
- metal tube
- extruder
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention refers to a metal tube. In particular it refers to a foaming plastic coverage insulating tube and its manufacturing method. One purpose of the invention is realized like this the new type foaming plastic coverage metal tube is made up of metal tube, plastic foaming body layer and plastic protect outer layer which protect the plastic foaming body. Its feature is that plastic protect inner layer is installed between the metal tube and plastic foaming body layer. The other purpose of the invention is realized like this the feature of the manufacturing method of the new type foaming coverage metal tube is that each independent die arrangement compound head is in the same core of the axis. The advantage of the invention is that copper tube is rusted uneasily and can keep warm.
Description
Technical field:
The present invention relates to a kind of metal tube, particularly relate to a kind of heat-insulating foamed plastic coating pipe and manufacture method thereof.
Background technique:
Patent of invention ZL00115382.X discloses a kind of manufacture method of metal pipe with heat-insulating foamed plastic coating:
The technical solution step of this invention is as follows:
1) mud, dirt, greasy dirt are removed in metal tube surface treatment;
2) plastic foam material raw material preparation, mixing in extruder, heat fused, foaming;
3) plastic protective layer raw material preparation, mixing, heat fused in extruder;
4) metal tube preheating;
5) extruder is extruded the plastic foam material of fusing and is compound with the surface extruding of metal tube;
6) extruder is extruded the protective layer plastics of fusing, and compound with foaming body layer plastic co-extrusion;
7) cooling and shaping.
Be characterized in that above-mentioned the 4th, the 5th, the 6th step is one-time formed in composite machine head.
Composite machine head is by lock screw, interior adjusting screw with regulate screw outward and connect to form by preceding locknut, plug, mould parent, foaming machine neck, big mouthful mould, back locknut, sandwich layer rod, body, osculum mould, sheath machine neck and heater, between mould parent, foaming machine neck, sandwich layer rod and big mouthful mould, constitute foaming body runner S1, between body, sheath machine neck and big mouthful mould, constitute sheath runner S2.
Metal tube is under the preheating of heater; the plastics foam of fusing and foaming imports foaming body runner S1 by extruder down by the extruding of foaming machine neck; compound in the extruding of the surface of die orifice and metal tube; the protective layer plastics of fusing import sheath runner S2 down by the extruding that extruder passes through sheath machine neck; in die orifice and the coextru-lamination of plastic foam material layer; the metal pipe with heat-insulating foamed plastic coating with metal tube, plastic foam material layer and plastic protective layer is made in once-through.
The body material of plastic foam material layer can adopt PVC, polystyrene, polyethylene, polyurethane, polypropylene, or acrylonitrile butadient styrene, or ethylene-vinyl acetate copolymer.
There is following shortcoming in foregoing invention:
1. the mould structure of three step one is excessive.
2. metal tube adopts copper material usually, and the internal layer foaming body in use has air and enters, and easily produces patina shortened the working life of pipe.
Summary of the invention:
One of purpose of the present invention is: a kind of novel foamed plastic coating metal tube that can avoid producing patina is provided.
Two of purpose of the present invention is: a kind of novel foamed plastic coating production method of metal pipe is provided.
One of purpose of the present invention is achieved in that a kind of novel foamed plastic coating metal tube, comprising: the plastics protection of metal tube, plastic foam material layer and a protection plastic foam material layer is outer; It is characterized in that: also be provided with plastics protection internal layer between metal tube and the plastic foam material layer.
Two of purpose of the present invention is achieved in that a kind of novel foamed plastic coating production method of metal pipe, comprises the following steps:
1. metal tube surface treatment and cleaning.
2. the preparation of plastics protection internal layer raw material mixes heat fused in extruder.
3. plastic foam material layer raw material preparation mixes heat fused, foaming in extruder.
4. plastics are protected outer raw material preparation, mixing, heat fused in extruder.
5. extruder is extruded the inner plastic raw material of fusing, coats in the extruding of the surface of metal tube.
6. extruder is extruded the plastic foam material of fusing and be laminated with plastic protective layer.
7. extruder protects outer raw material to extrude in the plastics of fusing, and compound with foaming body layer plastics.
8. cooling and shaping.
It is characterized in that: above-mentioned the 5th, the 6th, the 7th step is typing respectively in mould composite machine head separately, and three moulds are laminated with the head coaxial core.
Advantage of the present invention is: copper pipe is difficult for getting rusty and being incubated.
Specific embodiments:
The concrete structure of a kind of novel foamed plastic coating metal tube of the present invention is from inside to outside: metal tube, plastics protection internal layer, plastic foam material layer and plastics protection are outer.
A kind of novel foamed plastic coating production method of metal pipe of the present invention is:
(1) metal tube surface treatment and cleaning.(2) preparation of plastics protection internal layer raw material mixes heat fused in extruder.(3) plastic foam material layer raw material preparation mixes in extruder, heat fused, foaming.(4) plastics are protected outer raw material preparation, mixing, heat fused in extruder.(5) extruder is extruded the inner plastic raw material of fusing, coats in the extruding of the surface of metal tube.(6) extruder is extruded the plastic foam material of fusing and be laminated with plastic protective layer.(7) extruder protects outer raw material to extrude in the plastics of fusing, and compound with the plastic foam material layer.(8) cooling and shaping.Key is: above-mentioned the 5th, the 6th, the 7th step is to be laminated with extrusion modling respectively in the head at separately mould, and three moulds be laminated with head must be on same axle core.
Claims (2)
1. a novel foamed plastic coating metal tube comprises: the plastics protection outer 3 of metal tube 1, plastic foam material layer 2 and a protection plastic foam material layer 2; It is characterized in that: also be provided with plastics protection internal layer 4 between metal tube 1 and the plastic foam material layer 2.
2. a novel foamed plastic coating production method of metal pipe comprises the following steps:
(1) metal tube surface treatment and cleaning.
(2) preparation of plastics protection internal layer raw material mixes heat fused in extruder.
(3) plastic foam material layer raw material preparation mixes heat fused, foaming in extruder.
(4) plastics are protected outer raw material preparation, mixing, heat fused in extruder.
(5) extruder is extruded the inner plastic raw material of fusing, coats in the extruding of the surface of metal tube.
(6) extruder is extruded the plastic foam material of fusing and be laminated with plastic protective layer.
(7) extruder is extruded the plastic protective layer raw material of fusing, and compound with foaming body layer plastics.
(8) cooling and shaping.
It is characterized in that: above-mentioned the 5th, the 6th, the 7th step is to be laminated with moulding respectively in the head at separately mould, and three moulds are laminated with the head coaxial core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03115932XA CN1303352C (en) | 2003-03-21 | 2003-03-21 | Metal pipe convered with foamed plastic for thermal insulation and its mfg. method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03115932XA CN1303352C (en) | 2003-03-21 | 2003-03-21 | Metal pipe convered with foamed plastic for thermal insulation and its mfg. method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1598384A true CN1598384A (en) | 2005-03-23 |
| CN1303352C CN1303352C (en) | 2007-03-07 |
Family
ID=34658705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB03115932XA Expired - Fee Related CN1303352C (en) | 2003-03-21 | 2003-03-21 | Metal pipe convered with foamed plastic for thermal insulation and its mfg. method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1303352C (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095533C (en) * | 2000-04-13 | 2002-12-04 | 陈仁慈 | Metal pipe with heat-insulating foamed plastic coating and its manufacture |
| CN1309228A (en) * | 2001-03-24 | 2001-08-22 | 中国石化胜利油田有限公司采油工艺研究院 | Insulating steel tube and its making technology |
| CN2536876Y (en) * | 2002-04-24 | 2003-02-19 | 大庆油田建材制造安装有限责任公司 | High-temperature resistance thermal heating pipeline |
-
2003
- 2003-03-21 CN CNB03115932XA patent/CN1303352C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1303352C (en) | 2007-03-07 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070307 Termination date: 20150321 |
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| EXPY | Termination of patent right or utility model |