WO2020147233A1

WO2020147233A1 - Laptop computer housing and fabrication method therefor

Info

Publication number: WO2020147233A1
Application number: PCT/CN2019/087868
Authority: WO
Inventors: 高峰
Original assignee: 汉达精密电子(昆山)有限公司
Priority date: 2019-01-18
Filing date: 2019-05-21
Publication date: 2020-07-23
Also published as: CN111459223A

Abstract

Provided herein are a laptop computer housing and a fabrication method therefor. The main body of the laptop computer housing herein is made by a thermoplastic composite material plate undergoing infrared heating and then pressing; the thermoplastic composite material plate comprises two fiber layers and an intermediate layer, the fiber layers contain an impregnated thermoplastic resin, and the intermediate layer is provided between the two fiber layers.

Description

Notebook computer shell and manufacturing method thereof

This disclosure claims the priority of a Chinese patent application filed with the Chinese Patent Office with an application number of 201910051217.8 on January 18, 2019, and the entire content of the above application is incorporated into this disclosure by reference.

Technical field

This article relates to the manufacturing field of notebook computer shells, such as a notebook computer shell and its manufacturing method.

Background technique

With the development of electronic and electrical equipment and information equipment such as notebook computers, tablet computers, portable phones, portable information terminals or cameras, there is a strong demand for the development of thin and lightweight products in the market. Thin and light products require thin-walled, light-weight outer shells or internal components that constitute the product, but also require high strength and high rigidity.

Composite materials have the advantages of light weight, high strength and high modulus, chemical corrosion resistance, fatigue resistance, and easy integral molding. They are widely used in the production of military, aircraft, automobiles, wind power and other products. Due to the excellent mechanical properties of the composite material, it can also be used in the shell of electronic and electrical equipment such as notebook computers, tablet notebooks, portable phones, portable information terminals or cameras, and information equipment, which plays a role in making the shell thinner and reducing the weight of the equipment. .

At present, most of the thermoplastic composite products used in electronic appliances, automobiles, sports equipment and other products use composite sheets of continuous carbon fiber and continuous glass fiber for forming and processing, and the density of the thermoplastic full carbon fiber composite sheet is 1.40～1.60g/cm ³ , The density of the composite sheet of carbon fiber and glass fiber is 1.60～1.80g/cm ³ , although the modulus and rigidity are high enough, the weight of the product is still heavy, which does not conform to the current development direction of lightweight.

In view of this, it is really necessary to develop a lightweight laptop shell to overcome the disadvantage of the prior art that the laptop shell is too heavy.

Summary of the invention

This article provides a notebook computer shell, which can realize the lightweight and weight reduction of the notebook computer shell while maintaining the high strength and high modulus performance of the composite sheet.

This article provides a notebook computer shell. The main body of the notebook computer shell is formed by infrared heating and pressing of a thermoplastic composite material sheet. The thermoplastic composite material sheet includes two fiber layers and an intermediate layer. The fiber layer is impregnated with thermoplastic Resin, the intermediate layer is arranged between two fiber layers, and the intermediate layer is a thermoplastic resin layer containing hollow glass microspheres.

This article also provides a manufacturing method of a notebook computer shell. The manufacturing method includes the following steps:

Cut the thermoplastic composite sheet into the size required by the laptop;

Infrared heating the cut plate;

Heating the injection mold;

Place the infrared heated plate into the injection mold for positioning;

Clamp the injection mold, press the plate into the desired shape, and injection molding;

Cool the injection mold and open the mold to take out the product.

BRIEF DESCRIPTION

Figure 1 shows a schematic diagram of a thermoplastic composite sheet used in this article.

Figure 2 shows a schematic diagram of the infrared oven used in this article.

Figure 3 shows a schematic diagram of the injection mold in this article.

Fig. 4 shows a schematic diagram of the thermoplastic composite material sheet in this article after being laminated.

detailed description

The detailed description is as follows in conjunction with the drawings. Please refer to FIG. 1, where FIG. 1 is a schematic diagram of the thermoplastic composite sheet used herein.

In this embodiment, the main body of the notebook computer casing herein is formed by infrared heating and pressing of a thermoplastic composite material sheet 10, as shown in FIG. 1. The thermoplastic composite material sheet 10 includes two fiber layers 100 and an intermediate layer. 200. In this embodiment, the sheet 10 is formed by hot pressing and pressing, the fiber layer 100 is impregnated with a thermoplastic resin, the intermediate layer 200 is disposed between two fiber layers 100, and the intermediate layer 200 contains The thermoplastic resin layer of hollow glass beads 210. The intermediate layer 200 can meet different design thickness requirements and greatly reduce the density of the plate 10, which can reach 0.9-1.2 g/cm ³ , thereby reducing the weight of the laptop casing.

It should be noted that in this embodiment, the thermoplastic composite material sheet 10 includes two fiber layers 100 and an intermediate layer 200, so that the laptop casing includes two fiber layers 100 and an intermediate layer 200 (see FIG. 4) . In this embodiment, the main body of the notebook computer casing is formed by pressing the plate 10 to form the main body of the notebook computer casing by extruding the plate 10 by means of mold clamping.

In some embodiments, the fiber layer 100 is a unidirectional or woven carbon fiber impregnated with thermoplastic resin, which maximizes the strength of the reinforced board 10 while retaining the carbon fiber texture.

In some embodiments, the particle size of the hollow glass beads 210 is 0.03-0.15 mm, and the bulk density of the hollow glass beads 210 is 0.3-0.4 g/cm ³ , so the compressive strength can reach 10 -125MPa, to assist in strengthening the strength of the board 10.

In some embodiments, the thermoplastic resin impregnated with the fiber layer 100 and the thermoplastic resin of the intermediate layer 200 are the same resin, for example, both can be polycarbonate resin. Since the same resin has the same physical properties, it is convenient for subsequent processing; The thermoplastic resin impregnated with the fiber layer 100 and the thermoplastic resin of the intermediate layer 200 may also be different thermoplastic resins.

Please refer to Figures 2 to 4 in combination, in which Figure 2 is a schematic diagram of the infrared oven used in this article, Figure 3 is a schematic diagram of the injection mold in this article, and Figure 4 is a schematic diagram of the thermoplastic composite sheet in this article after pressing Schematic. This article also provides a manufacturing method of a notebook computer shell for manufacturing the above-mentioned notebook computer shell. The manufacturing method includes the following steps:

(1) Cut the thermoplastic composite material sheet 10 into the size required by the notebook computer;

(2) Perform infrared heating on the cut sheet 10, the heating temperature depends on the resin used in the sheet, and the heating temperature can be the glass transition temperature of the thermoplastic resin;

(3) Heating the injection mold 400;

(4) Put the plate 10 heated by infrared into the injection mold 400 for positioning to prevent the plate 10 from shifting;

(5) Close the injection mold 400, press the plate 10 into the required shape of the notebook computer shell, refer to the pressed plate 20 shown in Figure 4, and injection-mold structural parts such as hooks;

(6) Cool the injection mold 400, open the mold and take out the product.

In some embodiments, the step (1) includes: milling or punching holes on the thermoplastic composite material sheet 10 to obtain the desired structure.

In some embodiments, the step (2) includes: putting the cut sheet 10 into an infrared oven 30. The infrared oven 300 has a temperature sensor 310, an infrared heating lamp 320, and a tray 330. The plate 10 is placed on the tray 330, the infrared heating tube 320 performs infrared heating on the plate 10, the temperature sensor 310 senses the temperature in the infrared oven 300, the infrared heating power is adjustable, the heating rate of the plate 10 is optimized, and the infrared heating The heating speed reaches 5-20℃/s, and the heating speed is fast, which shortens the entire molding cycle.

In some embodiments, the step (3) includes: passing water vapor into the injection mold 400 for heating, so as to achieve the rapid heating effect of the injection mold 400, and the heating rate can reach 2-5°C/s. The male mold 410 and the female mold 420 of the mold 400 are provided with channels 430 for passing water vapor.

In some embodiments, the step (6) includes: passing cooling water into the channel 430 to cool the injection mold 400, and the cooling rate can reach 2-5° C./s.

The following takes the use of thermoplastic polycarbonate resin composite material to make a 14-inch notebook computer case as an example. The detailed description is as follows.

Cut the sheet 10 according to the designed 14-inch laptop shell size. The cut size is: length 350mm, width 255mm, thickness 1mm, and milling holes on the sheet 10; put the cut sheet 10 into Heat in the infrared oven 300. The temperature in the infrared oven 300 rapidly rises to 200°C, and the plate 10 is heated to a softened state (without molten liquid dripping); the water vapor is turned on to heat the injection mold 400, and the mold surface is heated to 130- 140℃; quickly put the infrared heated plate 10 into the injection mold 400 and position it; the injection mold 400 is closed, and the clamping unit of the injection machine applies a high-pressure clamping force to the injection mold 400 to press the plate 10 into a notebook The shape of the computer casing is required, and structural parts such as hooks are injection molded; the injection mold 400 is kept at a constant temperature of 140-160°C for 50-60 seconds, and then cooled to 50-60°C when the mold is opened and the product is taken out. The product is Laptop shell; the end of a cycle.

It is understandable that by cyclically executing steps (1)-(6), multiple cases of the notebook computer can be manufactured.

Compared with the prior art, in the notebook computer casing and its manufacturing method in this paper, the casing body uses a thermoplastic composite material sheet 10, and the sheet 10 contains a thermoplastic resin layer containing hollow glass beads as the intermediate layer 200, and The two surface layers of 200 use fiber layer 100, which has the following technical effects:

1. The use of a thermoplastic resin layer containing hollow glass microspheres as the intermediate layer 200 realizes the light weight reduction effect of the thermoplastic composite sheet 10, and the density of the sheet 10 can reach 0.9-1.2g/cm ³ , which can achieve the weight reduction of the laptop shell The effect is reduced, and the amount of fiber used is reduced, and the cost is reduced.

2. The fiber layer 100 is wrapped on both sides of the middle layer 200 to maintain the high strength and high modulus performance of the thermoplastic composite sheet 10, and then maintain the performance of the notebook computer.

3. After the plate 10 is heated by infrared, it is directly injection molded. The infrared heating speed can reach 5-20℃/s, and the heating speed is fast, which shortens the entire molding cycle.

Claims

A notebook computer shell, the main body of the notebook computer shell is formed by infrared heating and pressing of a thermoplastic composite material sheet. The thermoplastic composite material sheet includes two fiber layers and an intermediate layer. The fiber layer is impregnated with a thermoplastic resin. The intermediate layer is arranged between the two fiber layers, and the intermediate layer is a thermoplastic resin layer containing hollow glass beads.
The notebook computer casing according to claim 1, wherein the fiber layer is unidirectional or woven carbon fiber impregnated with thermoplastic resin.
The notebook computer casing of claim 1, wherein the hollow glass beads have a particle size of 0.03-0.15 mm, and the hollow glass beads have a bulk density of 0.3-0.4 g/cm 3 .
The notebook computer case according to claim 1, wherein the thermoplastic resin impregnated with the fiber layer and the thermoplastic resin of the intermediate layer are the same resin.
The notebook computer casing of claim 4, wherein the resin is polycarbonate resin.
A manufacturing method of a notebook computer shell, used for manufacturing the notebook computer shell according to any one of claims 1 to 5, the manufacturing method comprising the following steps:

Cut the thermoplastic composite sheet into the size required by the laptop;

Infrared heating the cut plate;

Heating the injection mold;

Place the infrared heated plate into the injection mold for positioning;

Clamp the injection mold, press the plate into the desired shape, and injection molding;

The injection mold is cooled, the mold is opened, and the product is taken out, and the product is a laptop casing.
8. The method for manufacturing a notebook computer shell according to claim 6, wherein the step of cutting the thermoplastic composite material sheet into the size required by the notebook computer comprises: milling or punching holes on the thermoplastic composite material sheet.
The method for manufacturing a notebook computer casing according to claim 6, wherein the step of performing infrared heating on the cut sheet comprises: putting the cut sheet into an infrared oven, the infrared oven having temperature sensing The plate is placed on the tray, the infrared heating lamp tube performs infrared heating on the plate, and the temperature sensor senses the temperature in the infrared oven.
7. The method for manufacturing a notebook computer casing according to claim 6, wherein the step of heating the injection mold comprises: passing water vapor into the injection mold for heating.
8. The method for manufacturing a notebook computer casing according to claim 6, wherein the step of cooling the injection mold, and opening the mold to take out the product comprises: passing cooling water into the injection mold for cooling.