CN110131526A - A kind of two-layer compound insulating tube and its processing technology - Google Patents
A kind of two-layer compound insulating tube and its processing technology Download PDFInfo
- Publication number
- CN110131526A CN110131526A CN201910459169.6A CN201910459169A CN110131526A CN 110131526 A CN110131526 A CN 110131526A CN 201910459169 A CN201910459169 A CN 201910459169A CN 110131526 A CN110131526 A CN 110131526A
- Authority
- CN
- China
- Prior art keywords
- layer
- ldpe
- foaming
- insulating tube
- central hole
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
-
- 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
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Insulation (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of two-layer compound insulating tube and its processing technology, the preparation of this kind of two-layer compound insulating tube the following steps are included: 1, prepare PE foaming layer with a central hole and be formed；2, tubular LDPE layer is squeezed out by thin film extruding machine, PE foaming layer with a central hole is passed through to the center of LDPE layer extrusion, so that LDPE layer is attached to PE foaming layer surface；3, when LDPE layer is in a molten state by being conveyed with Texture Transfer band and stamping texture on LDPE layer surface；4, it is cooled and shaped.It is reduced using the raw material type that this kind of technique production two-layer compound insulating tube uses, texture can be formed in heat preservation pipe surface under the premise of not using electronic crosslinking foaming layer, so that the flame retardant property of insulating tube is more preferable, and superficial layer intensity increase is less prone to crack.
Description
Technical field
The invention belongs to insulating tube and insulating tube technology field, specifically a kind of two-layer compound insulating tube and its
Processing technology, two-layer compound insulating tube are used for pipe insulation, and the processing technology of two-layer compound insulating tube is kept the temperature for two-layer compound
The production of pipe.
Background technique
Currently, insulating tube is usually to cover outside refrigeration piping, play the role of keeping the temperature material in pipeline.Mainly
It covers on air conditioner refrigerating pipeline for being kept the temperature to the refrigerant in air-conditioning, reduces heat loss and improve system COP.
Existing insulating tube from-inner-to-outer generally comprise PE foaming layer with a central hole, electronic crosslinking foaming layer and
LDPE layer makes insulating tube facilitate positioning and installation, generally in electronic crosslinking foaming to increase the frictional force of heat preservation outer tube layer
Hot-forming textured on layer and LDPE layer, this is also the master that electronic crosslinking foaming layer is arranged between PE foaming layer and LDPE layer
Reason is wanted, while this kind of insulating tube, due to the presence of electronic crosslinking foaming layer, flame retardant property is poor, combustion is easy when encountering high temperature
It burns, there is fire hazard.
The production technology of existing insulating tube is usually: 1, fire retardant and plastics LDPE and Masterbatch is equal in blender
Mixed material is put into foaming machine by even mixing, is squeezed out tubulose PE foaming layer and is formed 3-5 days；2, by with texture heat
Pressure roller heated in electronic crosslinking foaming material volume attach LDPE layer and in the one side with LDPE layer hot stamping go out texture；It 3, will patch
The electronic crosslinking foaming material volume of attached good LDPE layer is cut, into strips according to the cutting of the outer diameter of tubulose PE foaming layer；4, in pipe
Shape PE foaming layer outer cladding one side has posted the electronic crosslinking foaming layer of LDPE layer, and wherein LDPE layer outwardly, passes through heat gun
By the electronic crosslinking foaming layer welding of LDPE layer.Insulating tube not only complex procedures, but also LDPE are produced using this kind of production technology
Layer is low with the intensity of electronic crosslinking foaming layer seam crossing, is easy to appear crack, while electronic crosslinking foaming layer flame retardant property is poor,
It is easy burning when encountering high temperature, there is fire hazard.
Summary of the invention
The present invention is in view of the shortcomings of the prior art, provide a kind of two-layer compound insulating tube and its processing technology, using the processing
The raw material type that uses of technique production two-layer compound insulating tube is reduced, can under the premise of not using electronic crosslinking foaming layer
It keeps the temperature pipe surface and forms texture, so that the flame retardant property of insulating tube is more preferable, and superficial layer intensity increase is less prone to crack.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals: a kind of two-layer compound heat preservation
Pipe, from-inner-to-outer are made of PE foaming layer with a central hole and LDPE layer, and the LDPE layer surface is equipped with texture.This bilayer
Composite thermal-insulating pipe flame retardant property is more preferable, and superficial layer intensity increase is less prone to crack.
A kind of two-layer compound keeps the temperature pipe processing technique, comprising the following steps: 1, prepare PE foaming layer with a central hole simultaneously
Sizing；2, tubular LDPE layer is squeezed out by thin film extruding machine, PE foaming layer with a central hole is passed through into LDPE layer extrusion
Center, so that LDPE layer is attached to PE foaming layer surface；3, when LDPE layer is in a molten state by with Texture Transfer band
It conveys and stamps texture on LDPE layer surface；4, it is cooled and shaped.The original used using this kind of technique production two-layer compound insulating tube
Expect that type is reduced, texture can be formed in heat preservation pipe surface under the premise of not using electronic crosslinking foaming layer, so that insulating tube
Flame retardant property it is more preferable, and superficial layer intensity increase is less prone to crack.
In above-mentioned technical proposal, it is preferred that prepare the specific steps of PE foaming layer and sizing with a central hole are as follows: will hinder
Combustion agent uniformly mixes in blender with plastics LDPE and Masterbatch, and mixed material is put into foaming machine, squeezes out in having
The tubulose PE foaming layer in heart hole is simultaneously formed 3-5 days.
In above-mentioned technical proposal, it is preferred that the extrusion temperature of the foaming machine is 170-220 DEG C.
In above-mentioned technical proposal, it is preferred that the extrusion temperature of the thin film extruding machine is 170-220 DEG C.
In above-mentioned technical proposal, it is preferred that in step 2, will be between PE foaming layer and LDPE layer by air intake device
Air siphons away, so that the LDPE layer under molten condition is adhered in PE foaming layer.
Two-layer compound insulating tube is produced using this kind of technique compared with prior art, the present invention having the following beneficial effects:
The raw material type used is reduced, and can be formed texture in heat preservation pipe surface under the premise of not using electronic crosslinking foaming layer, be made
The flame retardant property for obtaining insulating tube is more preferable, and superficial layer intensity increase is less prone to crack.
Specific embodiment
Present invention is further described in detail With reference to embodiment: a kind of two-layer compound insulating tube, in
And be made of outside PE foaming layer with a central hole and LDPE layer, the LDPE layer surface is equipped with texture, wherein the line of LDPE layer
Reason is latticed texture.
A kind of two-layer compound keeps the temperature pipe processing technique, and 1, fire retardant and plastics LDPE and Masterbatch is equal in blender
Mixed material is put into foaming machine by even mixing, and foaming machine squeezes out tubulose PE foaming layer with a central hole simultaneously at 200 DEG C
Sizing 3-5 days；2, tubular LDPE layer is squeezed out at 200 DEG C by thin film extruding machine, PE foaming layer with a central hole is passed through
The center of LDPE layer extrusion is at the same time siphoned away the air between PE foaming layer and LDPE layer by air intake device, so that
LDPE layer under molten condition is adhered in PE foaming layer；3, when LDPE layer is in a molten state by with Texture Transfer band
It conveys and stamps texture on LDPE layer surface；4, it is cooled and shaped.Above-mentioned transmission belt with texture is two counter-rotational phases
The transmission belt being mutually bonded, forms a circular channel passed through for composite thermal-insulating pipe between two transmission belts, circular channel it is interior
There is texture, LDPE layer stamps texture after transmission belt conveying in molten condition on side.
It is reduced using the raw material type that this kind of technique production two-layer compound insulating tube uses, electronic crosslinking can not used
Texture is formed in heat preservation pipe surface under the premise of foaming layer, so that the flame retardant property of insulating tube is more preferable, and superficial layer intensity increases
Add and is less prone to crack.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (6)
1. a kind of two-layer compound insulating tube, it is characterised in that: from-inner-to-outer is by PE foaming layer with a central hole and LDPE layer group
At the LDPE layer surface is equipped with texture.
2. a kind of two-layer compound keeps the temperature pipe processing technique, which comprises the following steps: 1, prepare PE with a central hole
Foaming layer is simultaneously formed；2, tubular LDPE layer is squeezed out by thin film extruding machine, PE foaming layer with a central hole is passed through into LDPE layer
The center of extrusion, so that LDPE layer is attached to PE foaming layer surface；3, when LDPE layer is in a molten state by with line
Reason transmission belt conveys and stamps texture on LDPE layer surface；4, it is cooled and shaped.
3. a kind of two-layer compound as claimed in claim 2 keeps the temperature pipe processing technique, which is characterized in that prepare with a central hole
The specific steps of PE foaming layer and sizing are as follows: fire retardant is uniformly mixed in blender with plastics LDPE and Masterbatch, will be mixed
Material after conjunction is put into foaming machine, is squeezed out tubulose PE foaming layer with a central hole and is formed 3-5 days.
4. a kind of two-layer compound as claimed in claim 3 keeps the temperature pipe processing technique, which is characterized in that the extrusion of the foaming machine
Temperature is 170-220 DEG C.
5. a kind of two-layer compound as claimed in claim 2 keeps the temperature pipe processing technique, which is characterized in that the thin film extruding machine
Extrusion temperature is 170-220 DEG C.
6. a kind of two-layer compound as claimed in claim 2 keeps the temperature pipe processing technique, which is characterized in that in step 2, pass through suction
Wind apparatus siphons away the air between PE foaming layer and LDPE layer, so that the LDPE layer under molten condition is adhered to PE foaming layer
On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910459169.6A CN110131526A (en) | 2019-05-29 | 2019-05-29 | A kind of two-layer compound insulating tube and its processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910459169.6A CN110131526A (en) | 2019-05-29 | 2019-05-29 | A kind of two-layer compound insulating tube and its processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110131526A true CN110131526A (en) | 2019-08-16 |
Family
ID=67582925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910459169.6A Pending CN110131526A (en) | 2019-05-29 | 2019-05-29 | A kind of two-layer compound insulating tube and its processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110131526A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06101785A (en) * | 1992-09-21 | 1994-04-12 | Mitsubishi Materials Corp | Foamed polyethylene covered pipe |
| CN2470634Y (en) * | 2000-11-17 | 2002-01-09 | 林中庆 | Formed foamed coated plastic pipe |
| CN1579732A (en) * | 2003-08-05 | 2005-02-16 | 通用电气公司 | Process and apparatus for embossing a film surface |
| JP2005291412A (en) * | 2004-04-01 | 2005-10-20 | Maezawa Kyuso Industries Co Ltd | Piping covering cover |
| CN201425143Y (en) * | 2009-04-30 | 2010-03-17 | 蔡明宪 | Air conditioning connecting twin tube |
| CN202432180U (en) * | 2012-01-17 | 2012-09-12 | 上海达锦暖通器材有限公司 | Foaming insulating pipe and connecting pipe with same |
| CN202901558U (en) * | 2012-10-23 | 2013-04-24 | 青岛鸿元橡塑发泡有限公司 | Heat preservation pipe |
| CN105799195A (en) * | 2014-12-29 | 2016-07-27 | 杜连合 | PE solar insulation pipe |
| CN105904749A (en) * | 2016-05-30 | 2016-08-31 | 顾地科技股份有限公司 | Production technology for producing prefabricated plastic thermal insulation pipeline through one-step method |
| CN109159432A (en) * | 2018-10-22 | 2019-01-08 | 河北昊天能源投资集团有限公司 | A kind of soft thermal insulating pipe continuous production device and production procedure |
-
2019
- 2019-05-29 CN CN201910459169.6A patent/CN110131526A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06101785A (en) * | 1992-09-21 | 1994-04-12 | Mitsubishi Materials Corp | Foamed polyethylene covered pipe |
| CN2470634Y (en) * | 2000-11-17 | 2002-01-09 | 林中庆 | Formed foamed coated plastic pipe |
| CN1579732A (en) * | 2003-08-05 | 2005-02-16 | 通用电气公司 | Process and apparatus for embossing a film surface |
| JP2005291412A (en) * | 2004-04-01 | 2005-10-20 | Maezawa Kyuso Industries Co Ltd | Piping covering cover |
| CN201425143Y (en) * | 2009-04-30 | 2010-03-17 | 蔡明宪 | Air conditioning connecting twin tube |
| CN202432180U (en) * | 2012-01-17 | 2012-09-12 | 上海达锦暖通器材有限公司 | Foaming insulating pipe and connecting pipe with same |
| CN202901558U (en) * | 2012-10-23 | 2013-04-24 | 青岛鸿元橡塑发泡有限公司 | Heat preservation pipe |
| CN105799195A (en) * | 2014-12-29 | 2016-07-27 | 杜连合 | PE solar insulation pipe |
| CN105904749A (en) * | 2016-05-30 | 2016-08-31 | 顾地科技股份有限公司 | Production technology for producing prefabricated plastic thermal insulation pipeline through one-step method |
| CN109159432A (en) * | 2018-10-22 | 2019-01-08 | 河北昊天能源投资集团有限公司 | A kind of soft thermal insulating pipe continuous production device and production procedure |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190816 |
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