WO2021258680A1

WO2021258680A1 - Middle frame manufacturing method and middle frame, and television

Info

Publication number: WO2021258680A1
Application number: PCT/CN2020/137292
Authority: WO
Inventors: 刘利强; 黎兵; 张黎
Original assignee: 深圳Tcl数字技术有限公司
Priority date: 2020-06-24
Filing date: 2020-12-17
Publication date: 2021-12-30
Also published as: CN113840107A

Abstract

A middle frame manufacturing method and a middle frame, and a television. The middle frame is made of pre-coated metal, and the middle frame is roll-formed. An application of a PCM material in the field of production of televisions is achieved. In the process of manufacturing the middle frame, the turnover and transportation in spray coating and anode processes are omitted, operation efficiency is improved, and production costs are reduced.

Description

Method for making middle frame, middle frame and television

priority

This disclosure requires the priority of a Chinese patent application filed with the Chinese Patent Office on June 24, 2020, the application number is "202010596076.0", and the application title is "a method for making a middle frame, a middle frame, and a television set". The entire content is incorporated into this disclosure by reference.

Technical field

The present disclosure relates to the technical field of televisions, in particular to a method for manufacturing a middle frame, a middle frame, and a television.

Background technique

Most of the existing TV middle frames are made of aluminum alloy material after multiple bendings. During the manufacturing process, spraying or anodizing is required to protect the middle frame, which makes the middle frame more expensive.

Therefore, how to provide a low-cost middle frame is an urgent problem to be solved.

Summary of the invention

In view of the above-mentioned shortcomings of the prior art, the purpose of the present disclosure is to provide a method for manufacturing a middle frame, a middle frame, and a television, and aims to provide a technical solution for a middle frame with low processing cost.

The technical solutions of the present disclosure are as follows:

The first aspect is a method for manufacturing a middle frame, which includes the following steps:

Provide a roll of material;

Rolling the coiled material into a forming strip by using a rolling process;

The forming belt is bent to obtain a middle frame.

In the above-mentioned method for manufacturing the middle frame, the pre-coated metal coil is formed by a rolling process. Since the pre-coated metal coil itself has a protective layer, the spraying and anodizing process steps are omitted, and the production cost is saved. The use of roll forming technology makes the manufactured middle frame have a wide range of structural applicability.

Optionally, in the manufacturing method, the step of rolling the roll material into a forming belt using a rolling process specifically includes:

The coiled material is sent to a rolling unit, and the coiled material is plastically deformed by the rolling of the rollers of the rolling die of the rolling unit to obtain a forming belt.

Optionally, the manufacturing method, wherein the step of bending the molding belt to obtain a middle frame specifically includes:

Along the length direction of the forming belt, dividing the forming belt into a number of straight strips with a certain length;

A V-shaped notch is cut on the side of the straight bar, and the straight bar is bent toward the inside of the V-shaped notch along the position of the V-shaped notch, and the two sides of the V-shaped notch are joined together to obtain Middle frame.

Optionally, the manufacturing method further includes: processing the joint formed by splicing the two sides of the V-shaped notch, and the processing includes welding and gluing after welding.

Optionally, in the manufacturing method, the straight bar is bent toward the inside of the V-shaped notch along the position where the V-shaped notch is located, wherein the bending angle is less than or equal to 90 degrees.

Optionally, the manufacturing method, wherein, before the step of rolling the coil into a forming strip by using a rolling process, the method further includes:

Welding and pulling of the provided coils.

In a second aspect, a middle frame includes a main body, wherein the material of the main body is pre-coated metal.

The above-mentioned middle frame adopts pre-coated metal as the processing material. Since the pre-coated metal itself has a protective layer, spraying or anodizing is not required, which simplifies the production process and has the advantage of low processing cost.

Optionally, the middle frame, wherein the body includes a first surface, a second surface, a third surface, a fourth surface, a fifth surface, and a sixth surface that are sequentially bent, and two adjacent surfaces A bending portion is formed therebetween, and the body includes a first bending portion, a second bending portion, a third bending portion, a fourth bending portion, and a fifth bending portion in sequence;

The first surface and the third surface are located on the same side of the second surface; the third surface and the fifth surface are respectively located on both sides of the fourth surface; the first surface and the The bending direction of the sixth surface is the same.

Optionally, in the middle frame, the pre-coated metal includes: a metal substrate and a coating layer coated on the surface of the metal substrate; the metal substrate includes galvanized sheet, stainless steel sheet, A base material made of aluminum alloy.

Optionally, in the middle frame, the coating is a single coating, and the thickness of the single coating is 10-30 μm.

Optionally, the middle frame, wherein the coating layer is a double coating layer, and the double coating layer includes a primer layer coated on the surface of the metal substrate and a primer layer coated on the surface of the primer layer. The surface coating.

Optionally, in the middle frame, the thickness of the primer layer is 3-10 μm.

Optionally, in the middle frame, the thickness of the top coating is 10-20 μm.

Optionally, in the middle frame, the bending angle between the second surface and the third surface is an acute angle.

Optionally, in the middle frame, the bending angle between the third surface and the fourth surface is a right angle.

Optionally, in the middle frame, the bending angle between the fourth surface and the fifth surface is an obtuse angle.

Optionally, the middle frame, wherein, when the metal substrate is a substrate formed of a galvanized sheet and the galvanized layer of the galvanized sheet is a smooth surface, the thickness of the galvanized layer is greater than Equal to 3μm.

Optionally, the middle frame, wherein, when the metal substrate is a substrate formed of a galvanized sheet and the galvanized layer of the galvanized sheet is a wire drawing surface, the thickness of the galvanized layer is greater than Equal to 5μm.

Optionally, in the middle frame, the coating layer includes a single coating layer and a double coating layer.

In a third aspect, a TV set includes a backlight module, and the backlight module includes the middle frame as described above.

Description of the drawings

FIG. 1 is a schematic diagram of a cross-sectional structure of a middle frame provided by an embodiment of the disclosure;

2 is a schematic flowchart of a method for making a middle frame provided by an embodiment of the present disclosure;

FIG. 3 is a process diagram of roll plastic forming and bending according to an embodiment of the disclosure;

FIG. 4 is a schematic diagram of a V-shaped cutting of a straight bar provided by an embodiment of the present disclosure before bending;

FIG. 5 is a schematic diagram of the welding and gluing position of the joint after the straight bar is bent according to the embodiment of the disclosure.

detailed description

In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are shown in the accompanying drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present disclosure more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present disclosure. The terms used in the specification of the present disclosure herein are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure.

The middle frame, the front frame, and the back plate cooperate to form the TV housing. The existing middle frame is mostly formed of aluminum alloy material after multiple bendings. In the production process, it is necessary to spray a protective coating or perform anodizing. The use of spraying and anodizing not only increases the production steps, but also prolongs the turnover and transportation cycle. At the same time, because spraying and anodizing will produce hazardous waste emissions, it is easy to cause pollution to the environment.

The inventor discovered that Pre-coated Metal (PCM for short) is widely used in the construction field. The pre-coating of the PCM is mass-produced by roll-coating paint, which has the advantages of high efficiency, environmental protection, and low cost. , There are few applications in the field of TV production. It is found through research that the feature structure of the component forming on TV products is relatively complex, and the performance requirements of PCM are relatively high. Especially the middle frame products have a large number of bending processes, and the product forming yield is extremely low.

Based on this, the present disclosure provides a solution that can solve the above technical problems, the details of which will be described in subsequent embodiments.

The present disclosure provides a middle frame, including a main body, and the material of the main body is pre-coated metal.

In the exemplary technology, as shown in FIG. 1, it is a schematic cross-sectional view of a middle frame provided by this embodiment. The body 10 includes a first surface 100, a second surface 110, a third surface 120, a fourth surface 130, a fifth surface 140, and a sixth surface 150 that are sequentially bent, and a curve is formed between two adjacent surfaces. The body 10 includes a first bending portion 101, a second bending portion 102, a third bending portion 103, a fourth bending portion 104, and a fifth bending portion 105 in sequence; the first surface 100 The third surface 120 is located on the same side of the second surface 110; the third surface 120 and the fifth surface 140 are respectively located on both sides of the fourth surface 130; the first surface 100 and The bending directions of the sixth surface 150 are the same. It is easy to understand that the first surface 100 and the second surface 110 are in close contact (rolling dead edge), and the sixth surface 150 and the fifth surface are also in close contact ( Rolling presses the dead edge). The bending angle between the second surface and the third surface may be an acute angle, and the bending angle between the third surface and the fourth surface may be a right angle. The bending angle between the fifth surface can be an obtuse angle, and the specific angle value can be set according to actual needs.

It should be noted that the middle frame provided in the present disclosure is not limited to the cross-section type middle frame described in the above exemplary technology, as long as it is a cross-section that can be achieved by rolling technology, it is within the technical principle category of the present disclosure.

In an implementation of this embodiment, the pre-coated metal includes: a metal substrate and a coating layer coated on the surface of the metal substrate; the metal substrate includes galvanized sheets, stainless steel sheets, aluminum The base material formed by the alloy. Among them, the substrates used are all commonly used substrates in the field, and therefore, the processing cost will not increase. Because the substrate is coated with a coating, spraying and anodizing processes can be omitted, and the production and operation efficiency of the middle frame can be greatly improved, and no hazardous waste will be generated during the production process, which is environmentally friendly.

In one implementation of this embodiment, when the metal substrate is a galvanized sheet and the galvanized layer of the galvanized sheet is smooth (smooth and flat), the thickness of the galvanized layer is required to be no less than 3 μm, and the galvanized layer When the zinc layer is less than 3 μm, the problem of poor weather resistance is likely to occur. It is easy to understand that the thickness of the zinc coating should not be too thick, because the thickening of the zinc coating means that the cost will also increase.

In an implementation of this embodiment, when the metal substrate is a galvanized sheet and the galvanized layer of the galvanized sheet is a wire drawing surface, the thickness of the galvanized layer is required to be no less than 5 μm, and the galvanized layer is less than 5 μm. At times, the problem of poor weather resistance easily occurs. It is easy to understand that the thickness of the galvanized layer should not be too thick, because the thickening of the galvanized layer means that the cost will also increase. For example, the thickness of the galvanized layer can be set to 10 μm.

In an implementation of this embodiment, the coating on the pre-coated metal can be a single coating, or a double coating, and of course, it can also be a triple coating. When the coating is a single coating, the coating is a polyester coating, for example, a polyurethane coating is used to coat the substrate, and a polyurethane coating film is formed on the surface of the substrate after drying. The thickness of the polyurethane coating film may be 10 μm to 15 μm, 15 μm to 20 μm, 20 μm to 25 μm, 25 μm to 30 μm.

Further, when the coating layer is a double layer, it includes a primer layer directly coated on the surface of the substrate and a top coating layer coated on the primer layer. Wherein, the primer coating includes, but is not limited to, polyester coating and epoxy coating. The top coating may be a polyester coating. The thickness of the top coating may be 10 μm to 12 μm, 12 μm to 14 μm, 14 μm to 16 μm, 16 μm to 18 μm, 18 μm to 20 μm. The thickness of the primer layer may be 3 μm to 5 μm, 5 μm to 8 μm, 8 μm to 10 μm.

In an implementation of this embodiment, the pencil hardness of the coating on the pre-coated metal must meet at least HB, for example, it may be 2H. It is easy to understand that because the pre-coated metal needs to be rolled and bent, the coating needs to have a certain degree of flexibility. Therefore, in this embodiment, the toughness of the coating needs to be bent by 1T. The coating does not fall off or crack. It is easy to understand that corresponding pigments can be added to the coating as needed to prepare coatings with different colors and different glosses. Therefore, the prepared middle frame can also be of various colors, such as silver gray or gold. , Brown and so on.

Based on the same inventive concept, the present disclosure also provides a method for making a middle frame. As shown in FIG. 2, the method includes the steps:

S10. Provide a roll of material;

The coil may be a pre-coated metal coil, and the pre-coated metal coil can be customized at the coil manufacturer according to requirements, or of course, it can also be produced and processed by outsourcing substrates and coatings. The coating of the provided pre-coated metal coil must meet the performance requirements of the pre-coated metal as described above, such as pencil hardness of 2H, flexibility of 1T, coating thickness, 20μm for single coating, double coating At this time, the thickness of the primer layer is 8μm and the thickness of the topcoat layer is 15μm.

S20. Rolling the pre-coated metal coil into a forming strip using a rolling process;

The rolling process, namely, Roll Forming, refers to a metal forming process in which metal is deformed under pressure through a series of special-shaped rolls. When passing these rolls, the metal deforms into a predetermined shape, so as to achieve the purpose of roll forming. The shapes of roll forming include roll angle, roll tube, roll C-shaped steel and roll U-shaped steel. Many materials can be used for roll forming, including composite materials, ferrous metals, and aluminum-brass alloys, copper alloys, lead, zinc, and tin. Roll forming is mainly used to process parts with continuous cross-sections.

As shown in Figure 3, the provided coils, such as pre-coated metal coils, are welded and drawn. The welding traction is to weld a lead for pulling the pre-coated coils on the pre-coated metal coils. The lead wire can draw the pre-coated metal coil into a roller press. The pre-coated metal coil is drawn to a rolling machine for rolling. The pre-coated metal coil is pressed on the rollers of the rolling mold and successively plastically deformed successively, and gradually deformed into the required cross-sectional shape of the final product, such as stripping Carry out roll bending, roll the dead edge of the rolled material belt, continue to roll after the dead edge is rolled, until the roll is formed, and the cross section is rolled into a forming belt as shown in Figure 1. It should be noted that the forming belt refers to a pre-coated metal material with a certain cross-sectional shape after the pre-coated metal coil is rolled by a roller press.

S30. Bending the molding belt to obtain a middle frame.

The pre-coated metal material with a certain cross-sectional shape after rolling is bent. It is easy to understand that the forming belt with a certain cross-sectional shape is bent according to the design requirements of the middle frame shape to obtain the middle frame.

In this embodiment, the manufactured middle frame does not need to be sprayed or anodized, the manufacturing process is environmentally friendly, and conforms to the development trend of green manufacturing, realizes the production of the PCM material TV middle frame, and reduces the manufacturing cost of the middle frame.

In an implementation of this embodiment, the step S30 specifically includes, along the length direction of the forming belt, dividing the forming belt into a number of straight strips with a certain length; it is easy to understand that the straight strip The length can be set as required. Perform corner bending V-notch cutting on the side of the straight bar, as shown in FIG. For example, the straight strip is bent at 90 degrees, as shown in Figure 5. After bending, the joints of the incisions are welded (formed welds), and the sealing glue is applied to the welds. The sealing process is performed to obtain the middle frame. Wherein, the cutting of the V-notch may be stamping cutting, laser cutting or water cutting. By welding and gluing the splicing seams, prevent the incisions at the seams from affecting the aging performance of the middle frame.

Based on the above-mentioned middle frame and manufacturing method, the present disclosure also provides a TV, the TV including a backlight module and a back cover, and the backlight module includes the above-mentioned middle frame. The manufacturing method and material of the middle frame are as described above, and will not be repeated here.

In summary, the present disclosure provides a method for manufacturing a middle frame, a middle frame, and a television, wherein the material of the middle frame is pre-coated metal; the middle frame is formed by rolling. The application of PCM material in the field of TV production is realized. During the production of the middle frame, the turnover and transportation of spraying and anode processes are eliminated, which improves operational efficiency and reduces production costs.

It should be understood that the application of the present disclosure is not limited to the above examples, and those of ordinary skill in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present disclosure.

Claims

A method for making a middle frame, which includes the following steps:

Provide a roll of material;

Rolling the coil into a forming strip by using a rolling process;

The forming belt is bent to obtain a middle frame.
5. The manufacturing method according to claim 1, wherein the step of using a rolling process to roll the roll material into a forming belt specifically includes:

The coiled material is sent to a rolling unit, and the coiled material is plastically deformed by the rolling of the rollers of the rolling die of the rolling unit to obtain a forming belt.
5. The manufacturing method of claim 1, wherein the step of bending the molding belt to obtain a middle frame specifically includes:

Along the length direction of the forming belt, dividing the forming belt into a number of straight strips with a certain length;

A V-shaped notch is cut on the side of the straight bar, and the straight bar is bent toward the inside of the V-shaped notch along the position of the V-shaped notch, and the two sides of the V-shaped notch are joined together to obtain Middle frame.
3. The manufacturing method of claim 3, further comprising: processing the joint formed by splicing the two sides of the V-shaped notch, and the processing includes welding and gluing after welding.
3. The manufacturing method of claim 3, wherein the straight bar is bent toward the inside of the V-shaped notch along the position of the V-shaped notch, wherein the bending angle is less than or equal to 90 degrees.
The manufacturing method according to claim 1, wherein, before the step of rolling the coil into a forming strip by using a rolling process, it further comprises:

Welding and pulling of the provided coils.
A middle frame includes a main body, wherein the material of the main body is pre-coated metal.
The middle frame of claim 7, wherein the body includes a first surface, a second surface, a third surface, a fourth surface, a fifth surface, and a sixth surface that are sequentially bent, and two adjacent surfaces A bending portion is formed therebetween, and the body includes a first bending portion, a second bending portion, a third bending portion, a fourth bending portion, and a fifth bending portion in sequence;

The first surface and the third surface are located on the same side of the second surface; the third surface and the fifth surface are respectively located on both sides of the fourth surface; the first surface and the The bending direction of the sixth surface is the same.
The middle frame of claim 7, wherein the pre-coated metal includes: a metal substrate and a coating layer coated on the surface of the metal substrate; the metal substrate includes galvanized sheet, stainless steel sheet, A base material made of aluminum alloy.
The middle frame according to claim 9, wherein the coating includes a single coating and a double coating.
The middle frame of claim 10, wherein the coating is a single coating, and the thickness of the single coating is 10-30 μm.
The middle frame of claim 10, wherein the coating layer is a double coating layer, the double coating layer comprising a primer layer coated on the surface of the metal substrate and a primer layer coated on the surface of the primer layer. The surface coating.
The middle frame of claim 12, wherein the thickness of the primer layer is 3-10 μm.
The middle frame according to claim 12, wherein the thickness of the top coating is 10-20 μm.
8. The middle frame of claim 8, wherein the bending angle between the second surface and the third surface is an acute angle.
8. The middle frame of claim 8, wherein the bending angle between the third surface and the fourth surface is a right angle.
8. The middle frame of claim 8, wherein the bending angle between the fourth surface and the fifth surface is an obtuse angle.
A television, including a backlight module, and the backlight module includes the middle frame according to any one of claims 8-17.