CN114377924A

CN114377924A - Coating fire-proof shielding method and polypropylene member

Info

Publication number: CN114377924A
Application number: CN202210060793.0A
Authority: CN
Inventors: 高赵; 李春平; 王学超; 张强
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-04-22

Abstract

The application relates to a coating fireproof shielding method and a polypropylene component. The coating fireproof shielding method is used for carrying out flame treatment and paint mist shielding treatment on a component, the component is provided with a shielding area and a spraying area, and the coating fireproof shielding method comprises the following steps: covering the shielding area by using a high-temperature resistant piece; carrying out flame treatment on the spraying area; spraying paint mist on the spraying area, and solidifying the paint mist; the refractory is withdrawn from the shield area. According to the coating fireproof shielding method, the high-temperature resistant part is covered on the shielding area of the component, and then flame treatment and paint mist spraying treatment are carried out on the component, so that the high-temperature resistant part can be prevented from being ignited by flame, and the fire hidden danger is avoided.

Description

Coating fire-proof shielding method and polypropylene member

Technical Field

The application relates to the technical field of coating, in particular to a coating fireproof shielding method and a polypropylene component.

Background

In China, when paint mist is sprayed on the surface of a polypropylene (PP) member, flame treatment is mostly needed to improve the surface tension of the member, and then the spraying requirement is met. Because of different use scenes, part of PP pieces do not need to be entirely and completely sprayed, and therefore parts which do not need to be sprayed need to be shielded, so that paint mist is prevented from flying to positions which do not need to be sprayed, and the appearance effect is prevented from being influenced.

The current practice is generally to cover the component with a plastic film and to attach it to the component by means of an adhesive tape at the locations where no spraying is required, but the component processing is such that the plastic film and the adhesive tape can be ignited when the flame edge comes into contact with the plastic film or the adhesive tape as the flame treatment step is being carried out. Therefore, the above method has a fire hazard.

Disclosure of Invention

In view of the above, it is necessary to provide a coating fire-proof shielding method and a polypropylene member which can avoid the fire hazard in the conventional shielding method.

According to one aspect of the present application, there is provided a coating fire-protection masking method for flame-treating and paint-mist-protecting a member having a masking region and a painting region, the coating fire-protection masking method comprising the steps of:

covering the shielded area with a refractory;

carrying out flame treatment on the spraying area;

spraying paint mist on the spraying area, and curing the paint mist;

withdrawing the refractory from the shielded area.

In one embodiment, the refractory comprises a ductile refractory.

In one embodiment, the refractory comprises aluminum foil.

In one embodiment, the covering the shielding region with the high temperature resistant member specifically includes the steps of:

and bonding the high-temperature resistant piece on the shielding area.

In one embodiment, the step of adhering the high temperature resistant member to the shielding region specifically includes the steps of:

and bonding the high-temperature resistant piece on the shielding area by using high-temperature glue.

In one embodiment, the adhering the high temperature resistant member to the shielding region by using a high temperature adhesive specifically includes the steps of:

and bonding the high-temperature resistant piece and the edge of the shielding area close to the spraying area by using high-temperature glue.

In one embodiment, the high temperature adhesive comprises an aluminum foil paper tape.

In one embodiment, after the tearing off the high temperature resistant member from the shielding region, the method further comprises the following steps:

and detecting whether the paint mist shields the shielding area, and if the paint mist shields the shielding area, scrapping the component.

In one embodiment, the member is a polypropylene member.

According to another aspect of the present application, a polypropylene member is also provided, which is prepared by the coating fire-proof shielding method.

According to the coating fireproof shielding method and the polypropylene component, the high-temperature resistant part is covered on the shielding area of the component, and then flame treatment and paint mist spraying treatment are carried out on the component, so that the high-temperature resistant part can be prevented from being ignited by flame, and the fire hidden danger is avoided.

Drawings

FIG. 1 is a schematic structural diagram of a component in an embodiment of the present application;

FIG. 2 is a schematic flow chart illustrating a method for applying a fire-blocking coating according to an embodiment of the present disclosure;

fig. 3 is a schematic flow chart of a coating fire-proof shielding method in a preferred embodiment of the present application.

100. A member; 10. a shielded area; 30. and (4) a spraying area.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The coating fire-proof masking method and the polypropylene member of the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a component in an embodiment of the present application; FIG. 2 is a schematic flow chart illustrating a method for applying a fire-blocking coating according to an embodiment of the present disclosure; fig. 3 is a schematic flow chart of a coating fire-proof shielding method in a preferred embodiment of the present application. For the purpose of illustration, only the structures described in connection with the present application are illustrated in the drawings.

The coating fire-proof shielding method disclosed in at least one embodiment of the present application is used for performing flame treatment and paint mist shielding treatment on the component 100. The member 100 may be made of polypropylene, but may be made of other materials, and the application is not limited thereto.

Referring to fig. 1, the component 100 has a shielding area 10 and a spraying area 30, the shielding area 10 refers to an area of the component 100 where paint mist spraying is not needed, and the spraying area 30 refers to an area of the component 100 where paint mist spraying is needed.

Referring to fig. 2, the coating fire-proof shielding method includes the following steps:

s610: the screening zone 10 is covered with a refractory.

Specifically, it is necessary to secure all of the shielding region 10 of the refractory covering member 100 to prevent the subsequent paint mist spraying process from affecting the shielding region 10. More specifically, the refractory component can be any component that can be easily masked on the masking zone 10 and that can remain stable and non-combustible during the flame treatment process. Therefore, the ignition hidden trouble in the subsequent flame treatment process can be avoided.

It should be noted that the surface of the shielding region 10 of the member 100 may be a flat surface or an uneven surface. Therefore, in order to ensure the completeness of the shielding region 10 of the refractory covering member 100, in terms of the design choice of the refractory, consideration should be given to the case where the surface of the shielding region 10 has irregularities.

Therefore, in some embodiments, the refractory member is a ductile refractory member. The extensible refractory member has good ductility and malleability and flexibility, and is operable to extend over the entire surface of the shielded area 10, whether the surface of the shielded area 10 is flat or irregular. In this way, the surface of the shielded area 10 can be prevented from being affected by the subsequent paint mist spraying treatment.

In particular to some embodiments, the ductile high temperature resistant member comprises at least one of aluminum foil (aluminum foil, aluminum paper), tin foil (tin foil, tin paper). It should be noted that the above description is only for illustrative purpose and should not be construed as limiting the present application. In the embodiment of the application, the ductile high-temperature resistant piece is aluminum foil paper. In practical application, the aluminum foil needs to have a proper length and width according to the size of the shielding member 100, and a proper thickness according to the shielding tightness and the operation convenience.

Further, a refractory is bonded to the shadow zone 10.

Specifically, the high temperature resistant member is fixed on the shielding region 10 by adhesive tape, so as to prevent the high temperature resistant member from displacement, dropping and affecting the covering stability of the high temperature resistant member.

Further, in order to prevent the adhesive tape from being ignited in the subsequent flame treatment process, a high temperature resistant member should be adhered to the shielding region 10 using a high temperature adhesive. Specifically, the high-temperature adhesive should be an adhesive tape designed to maintain stable physical and chemical properties during subsequent flame treatment. Therefore, the bonding stability of the high-temperature resistant part and the surface of the shielding area 10 can be ensured, and the fire hidden trouble can be avoided.

Alternatively, the high temperature adhesive may be an aluminum foil tape, which can ensure the adhesion stability of the high temperature resistant member to the shielding region 10 since the aluminum foil tape can prevent ignition during the flame treatment of the member 100. In practical application, the aluminum-foil tape needs to have a proper length and width according to the size of the component 100 to be adhered, and needs to have a proper thickness according to the shielding tightness and the operation convenience. It is to be understood that the above description is intended to be illustrative only and is not intended to be limiting.

It should be noted that the paint mist is not solidified immediately after being sprayed on the spraying area 30, and thus has a certain fluidity. At this time, if there is a gap between the edge of the high temperature member and the edge of the shielding region 10, the paint mist of the spraying region 30 may flow into the shielding region 10 along the surface of the member 100. In addition, when the spraying area 30 is sprayed, if there is a spraying angle between the spraying robot and the surface of the spraying area 30, and the spraying angle is not equal to 90 degrees, such as 80 degrees or 100 degrees. At this time, if there is a gap between the edge of the high temperature member and the edge of the shielding region 10, the paint mist may be inclined into the shielding region 10 through the gap.

Therefore, in order to prevent this, a high temperature glue should be used to bond the periphery of the refractory member and the edge of the shielding region 10 close to the spraying region. So, can fill the clearance that forms between the edge of mending high temperature resistant piece and the edge of shielding district 10 through the high temperature glue, and then prevent that the coating cloud spraying process from causing the influence to shielding district 10.

Further, the integrity of the bond of the refractory on the shaded area 10 is checked.

Specifically, the shielded rear member 100 should be subjected to the following checks: ensuring that the shielding areas 10 to be shielded are all shielded, the shielding edges are neat, ensuring that no gap exists between the high-temperature resistant piece and the shielding areas 10, and ensuring firm adhesion.

Further, after the inspection is free from problems, flame treatment and spray treatment may be performed on the shielded member 100.

S620: the spray area 30 is flame treated.

Specifically, the flame treatment is performed on the spraying area 30 to increase the surface tension of the spraying area 30 and meet the requirement of paint mist spraying.

S630: and spraying paint mist on the spraying area, and solidifying the paint mist.

Specifically, the paint mist may be sprayed on the spraying area 30 by a spraying robot.

Further, since the paint mist is not immediately solidified after being sprayed on the spraying area 30, it still has a certain fluidity. In order to ensure that the paint mist does not flow to the shielding region 10, the next process should be performed after the paint mist is cured.

S640: the refractory is torn away from the shield 10.

Specifically, after the paint mist is cured, the high temperature resistant member is torn off from the shielding region 10, and thus, the flame treatment and the paint mist spraying treatment of the member 100 are completed. It should be noted that the high temperature glue applied needs to be torn away from the shielding region 10.

Referring to fig. 3, in some embodiments, after the step of tearing the refractory from the shielding region 10, the following steps are further included:

s650: whether the shielding area 10 is shielded by the paint mist is detected, and if the shielding area 10 is shielded by the paint mist, the component 100 is scrapped.

Specifically, it is checked whether the spray area 30 of the component 100 is completely sprayed, e.g., is less sprayed, is short sprayed, etc. If the component 100 is sprayed less, the spray area is sprayed again.

Secondly, it is also necessary to detect whether the shielded area 10 of the member 100 is shielded by paint mist. If the shielded area 10 is not shielded by paint mist, the component 100 is sent to the next process, and if the shielded area 10 is shielded by paint mist, the component 100 is discarded.

The coating fireproof shielding method can realize paint mist shielding and completely avoid ignition risk, is easy to operate, and is an efficient coating fireproof shielding method which can be used for large-scale production.

As the same concept of the present application, the present application also provides a polypropylene member 100, and the polypropylene member 100 is prepared by the coating fire-proof shielding method as described above. In order to understand the process of the polypropylene member 100 prepared by the above-mentioned coating fire-proof shielding method, a polypropylene fender is exemplified in the present application.

The method comprises the following specific steps:

(1) covering the sheltered area 10 of the mudguard with aluminium foil paper;

preparing proper aluminum foil paper according to the size of the fender, wherein the length, the width and the thickness of the aluminum foil paper are 50m, 610mm and 0.03 mm.

Further, the prepared aluminum foil is used to shield the shield area 10 of the fender.

Further, the aluminum foil paper is adhered to the shielding area 10 of the mudguard by using aluminum foil paper adhesive tape;

selecting an aluminum foil adhesive tape with the length, width and thickness of 50m x 50mm x 0.07mm according to the size of the aluminum foil and the specification of a fender product, and preparing tools such as scissors for cutting.

The prepared tape of aluminum foil paper is used to bond the aluminum foil paper to the sheltered area 10 of the fender.

Further, if a plurality of pieces of aluminum foil paper are spliced on the shielding area 10 of the fender, the spliced parts of the aluminum foil paper should be adhered by using the prepared aluminum foil paper adhesive tape.

Further checking the adhesive integrity of the aluminium foil paper on the sheltered area 10 of the mudguard;

and inspecting the shielded mud guard to ensure that the shielding area 10 is shielded, the shielding edge is neat, the aluminum foil tape is firmly adhered, and the like. And after checking that no problem exists, entering the next step.

(2) Flame treatment is carried out on the spraying area 30 of the mudguard;

firstly, flame treatment is carried out on the spraying area 30 of the fender, so as to improve the surface tension of the spraying area 30 and meet the requirement of paint mist spraying.

(3) Spraying paint mist on the spraying area 30 of the fender, and solidifying the paint mist;

then, the paint mist is sprayed on the spraying area 30. Since the paint mist is not immediately solidified after being sprayed on the spray area 30 of the fender, it still has a certain fluidity. In order to ensure that the paint mist does not flow to the shielded area 10, the next step should be performed after the paint mist is cured.

(4) Tearing off the aluminum foil paper from the shielding area 10 of the mudguard;

and after the paint mist is solidified, tearing off the tin foil paper from the shielding area 10 of the fender, and finishing the paint mist spraying treatment of the fender. It should be noted that the high temperature glue is adhered and torn off.

(6) And detecting whether the shielding area of the fender product is shielded with paint mist.

Specifically, it is checked whether the spray area 30 of the fender is completely sprayed, e.g., less sprayed, lack of sprayed, etc. If the spraying is less and the spraying is not carried out, the spraying area of the fender is sprayed again.

Secondly, whether paint mist shielding exists in the shielding area 10 of the fender is also needed. If the shielded area 10 is not shielded by paint mist, the fender is sent to the next process, and if the shielded area 10 is shielded by paint mist, the fender is scrapped.

After the polypropylene fender is subjected to flame treatment and paint mist prevention shielding treatment, the spraying area 30 is uniformly sprayed, the shielding area 10 is not shielded by paint mist, and the appearance effect is good.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A coating fire-proof shielding method is used for carrying out flame treatment and paint mist shielding treatment on a component, the component is provided with a shielding area and a spraying area, and the coating fire-proof shielding method is characterized by comprising the following steps:

covering the shielded area with a refractory;

carrying out flame treatment on the spraying area;

spraying paint mist on the spraying area, and curing the paint mist;

withdrawing the refractory from the shielded area.

2. The coated fire protection shield method of claim 1, wherein the high temperature resistant member comprises a ductile high temperature resistant member.

3. The coated fire protection shield method of claim 2, wherein the high temperature resistant member comprises aluminum foil paper.

4. The finishing fire protection masking method according to claim 1, wherein the masking zone is masked with a high temperature resistant member, specifically comprising the steps of:

and bonding the high-temperature resistant piece on the shielding area.

5. The coated fire protection shield method of claim 4, wherein said adhering said refractory to said shield area comprises the steps of:

6. The coated fire protection shield method of claim 5, wherein the step of adhering the high temperature resistant member to the shield area using a high temperature glue comprises the steps of:

7. The coated fire protection shield method of claim 5, wherein the high temperature adhesive includes aluminum foil paper tape.

8. The finishing fire protection shield method of claim 1, further comprising, after said tearing away said refractory from said shield area, the steps of:

9. The coated fire protection shield method of claim 1, wherein the member is a polypropylene member.

10. A polypropylene member, characterized in that it is produced by the coating fire-proof masking method according to any one of claims 1 to 9.