CN116020722A - Rotational molding process for urea cavity of integrated composite oil tank - Google Patents
Rotational molding process for urea cavity of integrated composite oil tank Download PDFInfo
- Publication number
- CN116020722A CN116020722A CN202211714843.9A CN202211714843A CN116020722A CN 116020722 A CN116020722 A CN 116020722A CN 202211714843 A CN202211714843 A CN 202211714843A CN 116020722 A CN116020722 A CN 116020722A
- Authority
- CN
- China
- Prior art keywords
- rotational molding
- fuel tank
- cavity
- urea
- molding process
- 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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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000004202 carbamide Substances 0.000 title claims abstract description 39
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 238000001175 rotational moulding Methods 0.000 title claims abstract description 21
- 239000002828 fuel tank Substances 0.000 claims abstract description 26
- 239000004698 Polyethylene Substances 0.000 claims abstract description 19
- -1 polyethylene Polymers 0.000 claims abstract description 19
- 229920000573 polyethylene Polymers 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 19
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000000446 fuel Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 18
- 230000003749 cleanliness Effects 0.000 abstract description 3
- 239000000295 fuel oil Substances 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention relates to the technical field of fuel tank preparation, in particular to a rotational molding process for an urea cavity of an integrated composite fuel tank. According to the rotational molding process provided by the invention, an aluminum alloy shell with the same size is manufactured only according to the cross section size of a fuel tank in the initial stage, the shell is embedded with a mold to form a containing space, then a proportioned mixture of polyethylene powder and toner is added into the containing space, and the mold is heated and rotated to finally form the composite fuel tank urea cavity with a double-layer structure. The composite oil tank urea cavity with the double-layer structure produced by the process can be highly integrated with the fuel oil cavity through welding, and has the advantages of high pressure bearing capacity and high internal cleanliness.
Description
Technical Field
The invention relates to the technical field of fuel tank preparation, in particular to a rotational molding process for an urea cavity of an integrated composite fuel tank.
Background
The fuel tank is an important component of a truck fuel supply system and is mainly used for containing fuel. Since the implementation of the national sixth standard, the emission technology of each national big host factory adopts a high-efficiency SCR strategy, in the technical route, the use of urea aqueous solution is indispensable, and the quality of the urea aqueous solution can even influence the power output of an engine, so that a urea tank becomes a necessary part of a national sixth model, namely, the national sixth model is mostly provided with a fuel tank and a urea tank. In the existing truck, the fuel tank, the urea tank and the boarding step ladder are all of split type structures, the split type structures are arranged on the chassis, a large amount of space can be wasted, and the split type structures of the fuel tank and the urea tank are required to be provided with fixing brackets respectively, so that the installation efficiency is low.
Based on the problems, the integrated composite oil tank assembly has the advantages that the oil tank body and the urea tank are inlaid and integrated together, and compared with the existing split type structure, the inlaid integrated structure saves occupied space and improves installation efficiency; meanwhile, a plurality of stepping steps are stamped inwards on the front end face of the oil tank body to replace an existing external boarding stepping ladder, so that the installation space of the external boarding stepping ladder is saved, and the installation efficiency is improved. The main production mode of the urea box is injection molding, and the production efficiency is low.
Therefore, a rotational molding process for the urea cavity of the integrated composite fuel tank is urgently needed, and the production efficiency of the integrated composite fuel tank can be effectively improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a rotational molding process for an urea cavity of an integrated composite oil tank, which is used for solving at least one problem in the background art. The process has high production efficiency and high surface glossiness of the molded plastic. The technical scheme adopted is as follows:
an integrated composite fuel tank urea cavity rotational molding process comprises the following steps:
s1, manufacturing an aluminum alloy shell with the same size according to the cross section size of a fuel tank, wherein the shell is embedded with a die to form a containing space;
s2, mixing polyethylene powder and toner and then adding the mixture into the accommodating space;
s3, rotational molding is carried out after the die is closed, the die rotates or swings along the axis of the die, and the die is heated at the same time;
and S4, under the action of centrifugal force and heat energy, the polyethylene powder and the toner are gradually and uniformly coated and melt-adhered on the inner surface of the aluminum alloy shell, and are cooled and then formed into the composite oil tank urea cavity with the double-layer structure.
Preferably, in S1, the aluminum alloy housing is highly integrated with the fuel cavity by welding.
Preferably, in the step S2, the ratio of the polyethylene powder to the toner is 300:1.
Preferably, in S3, the rotation or swing time is 2000-3000 seconds.
Preferably, in the step S3, the heating mode is that the heating is performed for 1200 seconds at 240-280 ℃, preferably 250 ℃, and then for 1200 seconds at 200-230 ℃, preferably 210 ℃.
Preferably, in the step S4, the cooling is performed by air cooling and spraying atomized alcohol at the same time.
Preferably, in the step S4, the thickness of the polyethylene powder after molding is 2-8mm, and as a further preferred design, the thickness of the polyethylene powder after molding is 5-6mm.
Compared with the prior art, the invention has the following advantages:
according to the rotational molding process provided by the invention, an aluminum alloy shell with the same size is manufactured only according to the cross section size of a fuel tank in the initial stage, the shell is embedded with a mold to form a containing space, then a proportioned mixture of polyethylene powder and toner is added into the containing space, and the mold is heated and rotated to finally form the composite fuel tank urea cavity with a double-layer structure. The composite oil tank urea cavity with the double-layer structure produced by the process can be highly integrated with the fuel oil cavity through welding, and has the advantages of high pressure bearing capacity and high internal cleanliness.
Drawings
FIG. 1 is a process flow diagram in an embodiment of the invention;
fig. 2 is a schematic structural view of a urea chamber of a composite fuel tank with a double-layer structure formed in example 1 of the present invention.
Wherein: 1-a fuel cavity and 2-an integrated composite fuel tank urea cavity.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the invention for ease of description and simplicity of description; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; some well known structures in the drawings and descriptions thereof may be omitted to avoid unnecessarily obscuring the concepts of the invention, for those skilled in the art; it is to be understood that the terms "upper," "lower," "left," "right," "top," "bottom," and the like are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate describing the present invention and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples.
Example 1
As shown in fig. 1 and 2, a rotational molding process for an integrated composite oil tank urea cavity comprises the following steps:
s1, manufacturing an aluminum alloy shell with the same size according to the cross section size of the fuel tank 1, and embedding the shell with a die to form a containing space. The aluminum alloy shell can be compressed into the fuel cavity through the necking, and is highly integrated with the fuel cavity 1 through a welding mode.
S2, mixing polyethylene powder and toner, and then adding the mixture into the accommodating space, wherein the ratio of the polyethylene powder to the toner is 300:1, in particular, can also be added according to the requirements of the color shade.
S3, rotational molding is carried out after die assembly, and the die rotates or swings along the axis of the die, wherein the rotation or swing time is 2400 seconds; simultaneously heating the die in the following heating mode: heating at 250 ℃ for 1200 seconds and then at 210 ℃ for 1200 seconds ensures the glossiness of the plastic surface of the urea cavity 2 of the integrated composite oil tank.
S4, under the action of centrifugal force and heat energy, the polyethylene powder and the toner are gradually and uniformly coated and fused and adhered on the inner surface of the aluminum alloy shell, and are cooled in a mode of simultaneously carrying out air cooling and atomizing alcohol spraying, and then the urea cavity of the composite oil tank with a double-layer structure is formed after cooling. The thickness of the formed polyethylene powder is 5mm, so that the pressure bearing capacity of the urea cavity 2 of the integrated composite oil tank and the light weight requirement of the whole automobile are considered.
Based on the technical scheme, the integrated composite oil tank urea cavity rotational molding process provided by the embodiment of the invention obtains the composite oil tank urea cavity with a double-layer structure. The composite oil tank urea cavity with the double-layer structure formed by the process can be highly integrated with the fuel oil cavity through welding, and has strong pressure bearing capacity and high internal cleanliness.
Example 2
An integrated composite fuel tank urea cavity rotational molding process comprises the following steps:
s1, manufacturing an aluminum alloy shell with the same size according to the cross section size of the fuel tank 1, and embedding the shell with a die to form a containing space. The aluminum alloy shell can be compressed into the fuel cavity through the necking, and is highly integrated with the fuel cavity 1 through a welding mode.
S2, mixing polyethylene powder and toner, adding the mixture into the accommodating space, and adjusting the proportion of the polyethylene powder to the toner to be 500 according to the required color: 2.
s3, rotational molding is carried out after die assembly, and the die rotates or swings along the axis of the die, wherein the rotation or swing time is 2400 seconds; simultaneously heating the die in the following heating mode: the plastic surface gloss of the urea cavity 2 of the integrated composite oil tank is guaranteed by heating for 1200 seconds at 280 ℃ and then for 1200 seconds at 230 ℃.
And S4, under the action of centrifugal force and heat energy, the polyethylene powder and the toner are gradually and uniformly coated and melt-adhered on the inner surface of the aluminum alloy shell, and are cooled and then formed into the composite oil tank urea cavity with the double-layer structure. The thickness of the formed polyethylene powder is 6mm, so that the pressure bearing capacity of the urea cavity 2 of the integrated composite oil tank and the light weight requirement of the whole automobile are considered.
Other points not described are the same as in example 1.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (7)
1. The rotational molding process of the urea cavity of the integrated composite oil tank is characterized by comprising the following steps of:
s1, manufacturing an aluminum alloy shell with the same size according to the cross section size of a fuel tank, wherein the shell is embedded with a die to form a containing space;
s2, mixing polyethylene powder and toner and then adding the mixture into the accommodating space;
s3, rotational molding is carried out after the die is closed, the die rotates or swings along the axis of the die, and the die is heated at the same time;
and S4, under the action of centrifugal force and heat energy, the polyethylene powder and the toner are gradually and uniformly coated and melt-adhered on the inner surface of the aluminum alloy shell, and are cooled and then formed into the composite oil tank urea cavity with the double-layer structure.
2. The process for rotational molding an integrated composite fuel tank urea cavity according to claim 1, wherein in S1, the aluminum alloy housing is highly integrated with the fuel cavity by welding.
3. The rotational molding process of an integrated composite fuel tank urea cavity according to claim 1, wherein in S2, the ratio of polyethylene powder to toner is 300:1.
4. The rotational molding process of an integrated composite fuel tank urea cavity according to claim 1, wherein in S3, the rotation or swing time is 2000-3000 seconds.
5. The process of claim 1, wherein in S3, the heating is performed for 1200 seconds at 240-280 ℃ and then for 1200 seconds at 200-230 ℃.
6. The process of claim 1, wherein in S4, cooling is performed by air cooling and spraying atomized alcohol.
7. The rotational molding process of the urea cavity of the integrated composite fuel tank according to claim 1, wherein in the step S4, the thickness of the molded polyethylene powder is 2-8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211714843.9A CN116020722B (en) | 2022-12-28 | 2022-12-28 | Rotational molding process for urea cavity of integrated composite oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211714843.9A CN116020722B (en) | 2022-12-28 | 2022-12-28 | Rotational molding process for urea cavity of integrated composite oil tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116020722A true CN116020722A (en) | 2023-04-28 |
| CN116020722B CN116020722B (en) | 2023-12-29 |
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| CN202211714843.9A Active CN116020722B (en) | 2022-12-28 | 2022-12-28 | Rotational molding process for urea cavity of integrated composite oil tank |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170070407A (en) * | 2015-12-14 | 2017-06-22 | 현대자동차주식회사 | Urea tank integrated with feul tank and method for manufacturing it |
| CN217374146U (en) * | 2022-04-28 | 2022-09-06 | 中国重汽集团济南动力有限公司 | Integrated form aluminum alloy oil tank urea case |
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2022
- 2022-12-28 CN CN202211714843.9A patent/CN116020722B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170070407A (en) * | 2015-12-14 | 2017-06-22 | 현대자동차주식회사 | Urea tank integrated with feul tank and method for manufacturing it |
| CN217374146U (en) * | 2022-04-28 | 2022-09-06 | 中国重汽集团济南动力有限公司 | Integrated form aluminum alloy oil tank urea case |
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| Publication number | Publication date |
|---|---|
| CN116020722B (en) | 2023-12-29 |
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