CN104475315A - Process of spraying polyurethane to surface of pipe - Google Patents
Process of spraying polyurethane to surface of pipe Download PDFInfo
- Publication number
- CN104475315A CN104475315A CN201410721518.4A CN201410721518A CN104475315A CN 104475315 A CN104475315 A CN 104475315A CN 201410721518 A CN201410721518 A CN 201410721518A CN 104475315 A CN104475315 A CN 104475315A
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- polyurethane
- layer
- pipe
- spraying
- cut
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- Application Of Or Painting With Fluid Materials (AREA)
- Thermal Insulation (AREA)
Abstract
The invention relates to a process of spraying polyurethane to the surface of a pipe. The process is characterized by including the steps of 1, spraying multiple stripes of polyurethane layers to the surface of a circular pipe along the axial direction, making sure that the top of each polyurethane layer is semicircular, reserving a gap between every two polyurethane layers, and performing polyurethane foaming; 2, cutting the top of each polyurethane layer to obtain a flat top; 3, spraying polyurethane to the gaps between the adjacent polyurethane layers to fully fill the gaps, and performing polyurethane foaming; 4, cutting the top of each polyurethane layer re-sprayed to obtain the flat top; and 5, polishing edges of the polyurethane layers on the surface of the circular pipe to obtain the smooth surfaces of the polyurethane layers. The process has the advantages that transferring among production lines is not required, time and labor are saved, polyurethane material is saved, and warmth retention of the pipe is ensured.
Description
Technical field
The present invention relates to a kind of spraying coating process, for the surface spraying polyurethane coating at body, be typically used as on utilidor peculiar to vessel and wet tank.
Background technology
Fiberglass (FRP), i.e. fiber-reinforced plastic, its light weight and hard, non-conductive, mechanical strength is high, recycles few, corrosion-resistant, can replace steel manufacturing machine part and automobile, ship housing etc.The surface of utilidor peculiar to vessel and wet tank, by needs sprayed glass steel, makes surface look more smooth attractive in appearance, and forms heat-insulation layer to improve heat insulation effect.
To the technique that body sprays be: first a pipe is first cut in the past, make two semi-circular tubes, take subsequently on another set of product line spraying polyurethane on the outer wall of semi-circular tube, and foaming forms one layer of heat preservation layer, again with to its surface finish with ensure surface smooth attractive in appearance, the semi-circular tube finally two being coated with polyurethane foaming layer welds formation insulating tube.
But this spraying coating process has two place's shortcomings:
1, body spraying needs to shift repeatedly on a production line, wastes time and energy, causes spray efficiency to reduce.
2, polyurethane foam complete after need to cut its surface irregularity place, the polyurethane foam material that these cut down is more more, causes great waste to raw material.
3, after two semi-circular tubes weld after having sprayed, weld has obvious macroscopic gap, and weld does not have layer of polyurethane, causes the heat insulation effect at gap place poor.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, provide a kind of spraying coating process of tube surfaces polyurethane, this spraying coating process is without the need to shifting on a production line, time saving and energy saving, saves urethane raw, ensure that the heat insulation effect of body.
The object of the present invention is achieved like this:
The spraying coating process of tube surfaces polyurethane of the present invention, this spraying coating process is realized by following steps:
1) axis on the surface of pipe first along pipe sprays many layer of polyurethane, the top semicircular in shape of layer of polyurethane, leaves gap, polyurethane foam subsequently between adjacent two layer of polyurethane;
2) top of layer of polyurethane is cut, its top is cut flat;
3) spraying polyurethane again in the gap between adjacent bright wisp layer of polyurethane, fills up gap, subsequently polyurethane foam;
4) top of the layer of polyurethane again sprayed is cut, its top is cut flat;
5) layer of polyurethane on pipe surface is polished, grind off corner angle, make layer of polyurethane smooth surface.
Compared with prior art, the invention has the beneficial effects as follows:
1, body spraying and cutting do not need to shift on a production line, time saving and energy saving, improve spray efficiency.
2, complete rear of polyurethane foam need cut its top layer, and the polyurethane foam material cut down is less, saves raw material, reduces cost.
3, weld without the need to being cut by pipe, body does not just exist gap, and body skin fills layer of polyurethane, ensure that the heat insulation effect of body again.
Accompanying drawing explanation
Fig. 1 be in spraying coating process of the present invention step one complete after the sectional view of pipe.
Fig. 2 be in spraying coating process of the present invention step 2 complete after the sectional view of pipe.
Fig. 3 be in spraying coating process of the present invention step 3 complete after the sectional view of pipe.
Fig. 4 be in spraying coating process of the present invention step 4 complete after the sectional view of pipe.
Fig. 5 be in spraying coating process of the present invention step 5 complete after the sectional view of pipe.
Detailed description of the invention
See Fig. 1, the present invention relates to a kind of spraying coating process of tube surfaces polyurethane, this spraying coating process is realized by following steps:
1) axis on the surface of pipe first along pipe sprays many layer of polyurethane, the top semicircular in shape of layer of polyurethane, and leave gap, polyurethane foam subsequently between adjacent two layer of polyurethane, the pipe after spraying as shown in Figure 1.
2) cut the top of layer of polyurethane, cut flat by its top, the pipe after cutting as shown in Figure 2.
3) spraying polyurethane again in the gap between adjacent bright wisp layer of polyurethane, filled up in gap, subsequently polyurethane foam, the pipe after spraying as shown in Figure 3.
4) cut the top of the layer of polyurethane again sprayed, cut flat by its top, the pipe after cutting as shown in Figure 4.
5) polish to the layer of polyurethane on pipe surface, grind off corner angle, make layer of polyurethane smooth surface, the pipe after polishing as shown in Figure 5.
After completing above-mentioned five steps, the spraying of pipe is just completed, and compared with traditional technique, the present invention has the following advantages:
1, body spraying and cutting do not need to shift on a production line, time saving and energy saving, improve spray efficiency.
2, complete rear of polyurethane foam need cut its top layer, and the polyurethane foam material cut down is less, saves raw material, reduces cost.
3, weld without the need to being cut by pipe, body does not just exist gap, and body skin fills layer of polyurethane, ensure that the heat insulation effect of body again.
Claims (1)
1. a spraying coating process for tube surfaces polyurethane, is characterized in that: this spraying coating process is realized by following steps:
1) axis on the surface of pipe first along pipe sprays many layer of polyurethane, the top semicircular in shape of layer of polyurethane, leaves gap, polyurethane foam subsequently between adjacent two layer of polyurethane;
2) top of layer of polyurethane is cut, its top is cut flat;
3) spraying polyurethane again in the gap between adjacent bright wisp layer of polyurethane, fills up gap, subsequently polyurethane foam;
4) top of the layer of polyurethane again sprayed is cut, its top is cut flat;
5) layer of polyurethane on pipe surface is polished, grind off corner angle, make layer of polyurethane smooth surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410721518.4A CN104475315A (en) | 2014-12-03 | 2014-12-03 | Process of spraying polyurethane to surface of pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410721518.4A CN104475315A (en) | 2014-12-03 | 2014-12-03 | Process of spraying polyurethane to surface of pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104475315A true CN104475315A (en) | 2015-04-01 |
Family
ID=52749993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410721518.4A Pending CN104475315A (en) | 2014-12-03 | 2014-12-03 | Process of spraying polyurethane to surface of pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104475315A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6079452A (en) * | 1993-06-07 | 2000-06-27 | Liquid Polymers Group | Pipe coating |
-
2014
- 2014-12-03 CN CN201410721518.4A patent/CN104475315A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6079452A (en) * | 1993-06-07 | 2000-06-27 | Liquid Polymers Group | Pipe coating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150401 |
|
| RJ01 | Rejection of invention patent application after publication |