阅读说明：本技术 一种耐高温的机油浮子及其制备方法 (High-temperature-resistant engine oil floater and preparation method thereof ) 是由 王斌 刘长华 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种耐高温的机油浮子,包括油浮子本体,所述油浮子本体的外表面上喷涂有一层氟橡胶保护层,所述氟橡胶保护层完全覆盖所述油浮子本体,所述油浮子本体为耐高温的发泡在模具内浇铸一体成型,所述氟橡胶保护层与所述油浮子本体之间还镀有一层铝膜,所述铝膜通过真空蒸发镀膜工艺镀于油浮子本体与氟橡胶保护层之间。本发明提供了一种耐高温的机油浮子,结构稳定,油浮子本体外表面上的氟橡胶保护层可有效防止机油浮子在高温条件下产生变形或者机油渗入浮子内的现象,保证了机油浮子的稳定性,保证了机油油位开关工作时的稳定性。(The invention discloses a high-temperature-resistant oil float, which comprises an oil float body, wherein a fluororubber protective layer is sprayed on the outer surface of the oil float body, the fluororubber protective layer completely covers the oil float body, the oil float body is formed by casting high-temperature-resistant foam in a mold into a whole, an aluminum film is further plated between the fluororubber protective layer and the oil float body, and the aluminum film is plated between the oil float body and the fluororubber protective layer through a vacuum evaporation coating process. The invention provides a high-temperature-resistant oil float which is stable in structure, and a fluororubber protective layer on the outer surface of an oil float body can effectively prevent the oil float from deforming or engine oil from permeating into the float under a high-temperature condition, so that the stability of the oil float is ensured, and the stability of an engine oil level switch during working is ensured.)

1. The utility model provides a high temperature resistant machine oil float, includes oil float body (1), its characterized in that, the spraying has one deck fluorine rubber protective layer (2) on the surface of oil float body (1), fluorine rubber protective layer (2) cover completely oil float body (1), oil float body (1) is casting integrated into one piece for high temperature resistant polyurethane PU foaming in the mould.

2. The high-temperature-resistant oil float as claimed in claim 1, wherein an aluminum film (4) is further plated between the fluororubber protective layer (2) and the oil float body (1).

3. The high-temperature-resistant oil float as claimed in claim 2, characterized in that a stepped hole (3) is formed in the middle of the oil float body (1); the surface of the stepped hole (3) is also sequentially provided with an aluminum film (4) and a fluororubber protective layer (2).

4. The method for preparing the high temperature resistant oil float of claim 3, comprising the steps of:

s1: preparing an oil floater body (1), foaming and heating high-temperature-resistant Polyurethane (PU) to a molten state, pouring the molten polyurethane into a mold, standing and molding for 30-50min to obtain the oil floater body (1);

s2: coating an aluminum film (4), namely coating a layer of aluminum film (4) on the outer surface of the oil float body (1) prepared in the step (1) through a vacuum coating process, wherein the aluminum film (4) completely covers the outer surface of the oil float body (1);

s3: preparing a fluororubber solution, dissolving fluororubber in butyl acetate to prepare the fluororubber solution with the mass fraction of 8% -15%;

s4: spraying a fluororubber protective layer (2), placing the oil float body (1) plated with the aluminum film (4) prepared in the step S2 in an environment at 100-150 ℃, and spraying the fluororubber solution prepared in the step S3 on the surface of the oil float body (1) through a pneumatic spray gun until the fluororubber solution completely covers the outer surface of the oil float body (1) to form the fluororubber protective layer (2);

s5: standing the oil floater body (1) sprayed with the fluororubber solution at normal temperature for 20-40min to completely volatilize a solvent butyl acetate in the fluororubber solution;

s6: and (4) putting the oil floater body (1) dried in the step (S5) into an oven, slowly heating the temperature in the oven to 60-80 ℃, standing for 1-2h under the temperature condition, then heating the oven to 100-150 ℃, baking for 60-72h, and taking out to obtain the high-temperature-resistant oil floater.

5. The method as claimed in claim 4, wherein the fluororubber in step S3 is type 26 fluororubber.

6. The method for preparing the high temperature resistant oil float according to claim 5, wherein the temperature of the spraying environment of the oil float body (1) in the step S4 is 120 ℃.

7. The method for preparing the high temperature resistant oil float according to claim 6, wherein the oil float body (1) sprayed with the fluororubber solution in the step S5 is allowed to stand at normal temperature for 30 min.

Technical Field

The invention relates to the technical field of engine oil switches, in particular to a high-temperature-resistant engine oil floater and a preparation method thereof.

Background

The oil level switch is a sensor for detecting the oil level of the oil in the oil pan of the automobile engine, and the oil in the oil pan has higher temperature which can reach 130 ℃. In order to ensure that the floater of the oil level switch can work in a high-temperature and complex engine oil environment, the floater is required to be resistant to high temperature and engine oil, not deformed, not absorb oil, not deformed, maintain buoyancy, not increase weight and not lose weight. At present, various float materials in China cannot achieve the performances of high temperature resistance and engine oil resistance. And the float process is restricted by the process and the use condition, so that the float can not be made into any shape and size. Some float materials are not high temperature resistant and are easy to deform. Some special floaters are high-temperature resistant but cannot resist engine oil, and the high-temperature engine oil can permeate into the foaming pores of the floaters to increase the weight of the floaters. The above causes the float not to float in the oil in a high temperature state.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides a preparation method of a porous carbon and sulfur composite material and application thereof, and solves the problems that an engine oil floater in the prior art cannot achieve the performances of high temperature resistance and engine oil resistance, and the engine oil floater is easy to deform and penetrate into a foaming pore of the floater when used in a high-temperature engine oil environment, so that the stability of the engine oil level switch is influenced.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a high temperature resistant machine oil float, includes the oil float body, the spraying has one deck fluorine rubber protective layer on the surface of oil float body, the fluorine rubber protective layer covers completely the oil float body, the oil float body is casting integrated into one piece in the mould for high temperature resistant polyurethane PU foaming.

Furthermore, an aluminum film is plated between the fluororubber protective layer and the oil float body.

Furthermore, a stepped hole is formed in the middle of the oil float body; and an aluminum film and a fluororubber protective layer are sequentially arranged on the surface of the stepped hole.

The preparation method of the high-temperature-resistant oil floater comprises the following steps:

s1: preparing an oil floater body, namely foaming and heating high-temperature-resistant Polyurethane (PU) to a molten state, pouring the molten PU into a mold, standing and molding for 30-50min to obtain the oil floater body;

s2: coating an aluminum film, namely coating a layer of aluminum film on the outer surface of the oil floater body prepared in the step 1 by a vacuum coating process, wherein the aluminum film completely covers the outer surface of the oil floater body;

s3: preparing a fluororubber solution, dissolving fluororubber in butyl acetate to prepare the fluororubber solution with the mass fraction of 8% -15%;

s4: spraying a fluororubber protective layer, namely placing the oil float body plated with the aluminum film and prepared in the step S2 in an environment at 100-150 ℃, and spraying the fluororubber solution prepared in the step S3 on the surface of the oil float body through a pneumatic spray gun until the fluororubber solution completely covers the outer surface of the oil float body to form the fluororubber protective layer;

s5: standing the oil floater body sprayed with the fluororubber solution at normal temperature for 20-40min to completely volatilize a solvent butyl acetate in the fluororubber solution;

s6: and (4) putting the oil floater body dried in the step (S5) into an oven, slowly raising the temperature in the oven to 60-80 ℃, standing for 1-2h under the temperature condition, raising the temperature of the oven to 100-150 ℃, baking for 60-72h, and taking out to obtain the high-temperature-resistant oil floater.

Further, the fluororubber in step S3 is type 26 fluororubber.

Further, the temperature of the spraying environment of the oil float body in step S4 is 120 ℃.

Further, the oil float body sprayed with the fluororubber solution in step S5 is allowed to stand at room temperature for 30 min.

According to the invention, the high-temperature-resistant oil float is prepared by foaming high-temperature-resistant Polyurethane (PU) to prepare the oil float body, then, the fluororubber is dissolved in butyl acetate to prepare the fluororubber solution, then, the fluororubber solution is sprayed on the outer surface of the oil float body through a pneumatic spray gun, and the butyl acetate solvent is a volatile solvent, so that the butyl acetate solvent can be completely volatilized after the spraying and standing still for a period of time, at the moment, the fluororubber is completely coated on the outer surface of the oil float body, and then, the oil float body coated with the fluororubber protective layer is placed into an oven to be baked, thus the high-temperature-resistant oil float is prepared. The oil float body prepared by foaming the high-temperature-resistant polyurethane PU can ensure that the density of the whole oil float is less than that of engine oil which can float on the surface of the engine oil, and can bear the high temperature of the engine oil at about 130 ℃, and deformation can not occur.

Drawings

FIG. 1 is a schematic top view of an oil float according to the present invention;

FIG. 2 is a schematic cross-sectional view of a medium oil float according to embodiment 1 of the present invention;

fig. 3 is a schematic cross-sectional structural view of a medium oil float according to embodiment 2 of the present invention;

in the figure: 1. the oil floater comprises an oil floater body, 2, a fluororubber protective layer, 3, a stepped hole, 4 and an aluminum film.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Specific example 1:

as shown in fig. 1-2, a high-temperature resistant oil float comprises an oil float body 1, wherein a layer of fluororubber protective layer 2 is sprayed on the outer surface of the oil float body 1, the fluororubber protective layer 2 completely covers the oil float body 1, the oil float body 1 is formed by casting high-temperature resistant Polyurethane (PU) foam in a mold and integrally forming, and a stepped hole 3 is formed in the middle of the oil float body 1; the surface of the stepped hole 3 is also provided with a layer of fluororubber protection layer 2.

The preparation method of the high-temperature-resistant oil floater comprises the following steps:

s1: preparing an oil float body 1, heating high-temperature-resistant polyurethane PU to be in a molten state, pouring the molten polyurethane PU into a mold, standing and molding for 50min to obtain the oil float body 1;

s2: preparing a fluororubber solution, dissolving fluororubber in butyl acetate to prepare a fluororubber solution with the mass fraction of 10%;

s3: spraying a fluororubber protective layer 2, placing the oil floater body 1 prepared in the step S1 in an environment of 120 ℃, and spraying the fluororubber solution prepared in the step S2 on the surface of the oil floater body 1 through a pneumatic spray gun until the fluororubber solution completely covers the outer surface of the oil floater body 1 to form the fluororubber protective layer 2;

s4: standing the oil floater body 1 sprayed with the fluororubber solution at normal temperature for 30min to completely volatilize a solvent butyl acetate in the fluororubber solution;

s5: and (4) putting the oil floater body 1 dried in the step (S4) into an oven, slowly raising the temperature in the oven to 80 ℃, standing for 2 hours under the temperature condition, raising the temperature of the oven to 120 ℃, baking for 72 hours, and taking out to obtain the high-temperature-resistant oil floater.

According to the invention, the high-temperature-resistant oil float is prepared by foaming high-temperature-resistant Polyurethane (PU) to prepare the oil float body 1, then, the fluororubber is dissolved in butyl acetate to prepare a fluororubber solution, then, the fluororubber solution is sprayed on the outer surface of the oil float body 1 through a pneumatic spray gun, and the butyl acetate solvent is a volatile solvent, so that the butyl acetate solvent can be completely volatilized after the spraying and standing still for a period of time, at the moment, the fluororubber is completely coated on the outer surface of the oil float body 1, and then, the oil float body 1 coated with the fluororubber protective layer is placed into an oven to be baked, and the high-temperature-resistant oil float is prepared. The oil float body prepared by foaming the high-temperature-resistant polyurethane PU can ensure that the density of the whole oil float is less than that of engine oil which can float on the surface of the engine oil, and can bear the high temperature of the engine oil at about 130 ℃, and deformation can not occur.

Specific example 2:

as shown in fig. 3, the present embodiment is different from embodiment 1 in that: an aluminum film 4 is further plated between the fluororubber protective layer 2 and the oil floater body 1.

The preparation method comprises the following steps:

s1: preparing an oil float body 1, heating high-temperature-resistant polyurethane PU to be in a molten state, pouring the molten polyurethane PU into a mold, standing and molding for 50min to obtain the oil float body 1;

s2: coating an aluminum film 4, namely coating a layer of aluminum film 4 on the outer surface of the oil float body 1 prepared in the step 1 through a vacuum coating process, wherein the aluminum film 4 completely covers the outer surface of the oil float body 1;

s3: preparing a fluororubber solution, dissolving fluororubber in butyl acetate to prepare a fluororubber solution with the mass fraction of 10%;

s4: spraying a fluororubber protective layer 2, placing the oil float body 1 plated with the aluminum film 4 and prepared in the step S2 in an environment at 120 ℃, and spraying the fluororubber solution prepared in the step S3 on the surface of the oil float body 1 through a pneumatic spray gun until the fluororubber solution completely covers the outer surface of the oil float body 1 to form the fluororubber protective layer 2;

s5: standing the oil floater body 1 sprayed with the fluororubber solution at normal temperature for 30min to completely volatilize a solvent butyl acetate in the fluororubber solution;

s6: and (4) putting the oil floater body 1 dried in the step (S5) into an oven, slowly raising the temperature in the oven to 80 ℃, standing for 1-2 hours under the temperature condition, raising the temperature of the oven to 120 ℃, baking for 72 hours, and taking out to obtain the high-temperature-resistant oil floater.

According to the embodiment, the vacuum coating process is adopted to plate the aluminum film 4 between the fluororubber protection layer 2 and the oil float body 1, so that the strength of the protective film on the outer surface of the oil float body 1 can be increased, the aluminum film 4 on the surface of the oil float body 1 can be used for isolating the oil float body 1 and the fluororubber protection layer 2, the problem that the engine oil float fails due to the fact that the fluororubber penetrates the oil float body 1 due to poor temperature control in the baking process in the step 6 is solved, and the yield of products is improved.

The above-described embodiments are illustrative of the present invention and not restrictive, it being understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.