TWI398355B - Manufacturing method of composite workpiece for embedded metal parts - Google Patents

Description

Method for manufacturing composite workpiece with embedded metal parts

The invention relates to a method for manufacturing a composite workpiece, in particular to a method for manufacturing a composite workpiece with a buried metal member.

The function keys on the keys of the existing mobile phone or the cover of the notebook computer need to be embedded with metal parts in the position corresponding to the function keys in the outer casing, and when the function keys are pressed, the metal parts and the built-in circuit board can be The contact is turned on and the various functions are controlled.

At present, a composite material (for example, a prepreg woven fabric layer) is usually used, and the metal member is disposed on the composite material, and the outer casing is directly thermocompression-bonded to manufacture the outer casing, and the metal member is placed in the outer casing. At the position, since the composite material has a molten resin flowing inside at a high temperature, the problem of displacement of the metal member may occur due to the melt flow of the resin during the thermocompression bonding process, resulting in the function after the thermocompression is completed. The problem that the key and the metal piece cannot be accurately aligned.

Accordingly, it is an object of the present invention to provide a method of making a composite workpiece in which a buried metal member can be accurately positioned.

Therefore, the method for manufacturing a composite workpiece of the embedded metal member of the present invention comprises a first hot pressing step and a second hot pressing step.

The first hot pressing step is to align the plurality of first prepreg layers in a mold, the mold has a male mold, and a female mold having at least one concave portion corresponding to the metal member. The first prepreg layer is a stack Engaging in the master mold, and placing the metal member on the first prepreg layer and corresponding to the position of the recess portion, then performing thermocompression bonding, and thermocompression bonding to make the first prepreg The cloth layer forms a first composite material sheet, and the metal member is positioned at a predetermined position of the first composite material sheet by being restricted by the recess portion.

The second hot pressing step is to laminate a plurality of second prepreg layers on the first composite material sheet and perform thermocompression bonding to heat the second prepreg layer and the first composite sheet. Compressing a composite workpiece such that the metal member is positioned to be wrapped within the composite workpiece.

The effect of the present invention is that, by the above steps, the metal member is not displaced during the thermocompression, so that the metal member can be accurately positioned in the composite workpiece.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1, a first preferred embodiment of a method for manufacturing a composite workpiece having a buried metal member according to the present invention includes a first hot pressing step 21 and a second hot pressing step 22.

Referring to FIGS. 1 and 2, the first hot pressing step 21 is to vertically laminate the plurality of first prepreg layers 3 and heat-compress a first composite material sheet 4, so that a plurality of metal members 5 are positioned at the same. Predetermined position of the first composite sheet 4 At the office.

In this embodiment, each of the first prepreg layers 3 is formed with a plurality of perforations 31, and after the first composite material sheet 4 is hot-pressed, a plurality of the first composite sheets 4 are formed. The positioning hole 41 is formed by the through holes 31. The metal member 5 is formed in the positioning hole 41 after the first composite material plate 4 is formed.

The second hot pressing step 22 is to laminate a plurality of second prepreg layers 6 on the lower surface of the first composite material sheet 4 and to perform thermocompression bonding to the second prepreg layer. 6 is hot pressed with the first composite material sheet 4 to form a composite workpiece 7 such that the metal member 5 is positioned and wrapped in the composite workpiece 7.

It should be noted that, in this embodiment, the first prepreg layer 3 and the second prepreg layer 6 are formed by infiltrating the composite fiber into the resin, and the structure and characteristics thereof are well known. The artisan can easily understand and will not repeat them. The first prepreg layer 3 and the second prepreg layer 6 may be selected from carbon fiber woven fabric, glass fiber woven fabric, basalt fiber woven fabric, or carat fiber woven fabric. In addition, in the present embodiment, a plurality of metal members 5 are used. Of course, only one metal member 5 may be used depending on actual needs, and is not limited thereto.

By the above steps, the metal member 5 can be confined in the positioning hole 41 during the first hot pressing step 21, thereby ensuring that the metal member 5 is not due to the first prepreg layer. The internal heat melts the flowing resin to cause a displacement phenomenon, and the effect of accurately positioning the metal member 5 at a predetermined position of the first composite material sheet 4 to be accurately positioned in the composite workpiece 7 can be achieved.

Referring to FIG. 1 and FIG. 3, a second preferred embodiment of a method for manufacturing a composite workpiece of a buried metal member according to the present invention is substantially similar to the first preferred embodiment described above, except that the first hot pressing is performed. In the step 21, the first prepreg layer 3 is aligned and overlapped in a mold 8. The mold 8 has a male mold 81 and a female mold 82. The male mold 81 has a plurality of corresponding metal. a recessed portion 811 of the member 5, the first prepreg layer 3 is superposed on the master mold 82, and the metal member 5 is interposed on the first prepreg layer 3 and corresponds to After the position of the depressed portion 811 is further subjected to thermocompression bonding, the first prepreg woven fabric layer 3 is formed into the first composite material sheet 4 after thermocompression bonding, and the metal member 5 is subjected to the depressed portion 811. The limit is located at a predetermined position of the first composite sheet 4. The manner in which the composite workpiece 7 is subsequently formed is similar to that of the first preferred embodiment and will not be described again.

Thereby, the recessed portion 811 is used to achieve the precise positioning of the metal member 5 at a predetermined position of the first composite material sheet 4, thereby accurately positioning the workpiece in the composite workpiece 7, and providing another embodiment. For the user to choose.

In summary, the present invention shapes the composite workpiece 7 by means of overmolding, thereby achieving the effect of accurately positioning the metal member 5 in the composite workpiece 7, so that the present invention can be achieved. purpose.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

21‧‧‧First hot pressing step

22‧‧‧Second hot pressing step

3‧‧‧First prepreg weave

31‧‧‧Perforation

4‧‧‧First composite sheet

41‧‧‧Positioning holes

5‧‧‧Metal parts

6‧‧‧Second prepreg weave

7‧‧‧Composite workpiece

8‧‧‧Mold

81‧‧‧Male model

811‧‧‧Depression

82‧‧‧Female model

1 is a flow chart showing a first preferred embodiment of a method for manufacturing a composite workpiece of a buried metal member according to the present invention; FIG. 2 is a schematic view for assistance in explaining FIG. 1; and FIG. 3 is a schematic view illustrating the present invention. A second preferred embodiment of a method of manufacturing a composite workpiece in which a metal member is embedded.

twenty one. . . First hot pressing step

twenty two. . . Second hot pressing step

Claims (2)

A method for manufacturing a composite workpiece with a buried metal member, comprising: a first hot pressing step of aligning a plurality of layers of the first prepreg woven fabric in a mold, the mold having a male mold and a female mold The male mold has at least one recess corresponding to the metal member, the first prepreg layer is laminated in the master mold, and the metal member is placed on the first prepreg layer And after the position of the recessed portion is further subjected to thermocompression bonding, after the thermocompression bonding, the first prepreg woven fabric layer is formed into a first composite material sheet, and the metal member is positioned by the restriction of the recessed portion. And at a predetermined position of the first composite material sheet; and a second hot pressing step, further laminating a plurality of second prepreg layers on the first composite material sheet and performing thermocompression bonding to The second prepreg layer and the first composite sheet are hot pressed to form a composite workpiece, and the metal member is positioned and coated in the composite workpiece. The method for manufacturing a composite workpiece having a buried metal member according to claim 1, wherein the first prepreg layer and the second prepreg layer are selected from the group consisting of carbon fiber woven fabric and glass fiber. Weaving, basalt fiber weaving, or carat fiber weaving.