TWI473554B - Housing and manufacturing method thereof - Google Patents

Description

Case manufacturing method and the casing

The present invention relates to a method of manufacturing a casing and the casing, and more particularly to a method of manufacturing a casing for molding a casing on a film and a metal ring by in-mold molding, and the casing.

There are many types and brands of electronic products (such as mobile phones) on the market. If electronic products have no special appearance or shape, it is often difficult to attract consumers' attention. As a result, manufacturers often make changes to the shape, color, or pattern of the electronics housing, thereby increasing consumer desire to purchase.

At present, the outer casing of the electronic product is often integrally molded by the in-mold decoration molding method to improve the appearance of the electronic product casing. Since the outer casing of the electronic product is usually formed with a perforation (for example, a lens hole, a horn hole, or a socket corresponding to the position of the input and output ports), the perforation is decorated to enhance the appearance and texture of the product. A place that can be further improved.

An object of the present invention is to provide a method for manufacturing a casing, which can simultaneously form a casing into a film by means of in-mold forming, and a metal ring pierced through the film, thereby reducing manufacturing man-hours, and Can enhance the appearance and texture of the case.

The object of the present invention and the prior art problem are solved by the following technical means. According to the method for manufacturing a casing disclosed in the present invention, the method comprises the following steps:

(A) wearing a metal ring in a perforation of a film, such that an inner peripheral wall defining the perforation of the film is engaged in a ring groove of the outer circumferential surface of the metal ring;

(B) placing the film and the metal ring in a cavity of a female mold;

(C) clamping a male mold and a female mold so that a mold core of the male mold cooperates with the cavity to form a cavity;

(D) Injecting molten plastic into the cavity, filling the molten plastic on the film and the metal ring, and forming a casing integrally formed on the film and the metal ring after curing.

The object of the present invention and solving the prior art problems can be further achieved by the following technical means.

The manufacturing method of the casing further comprises a step (E) before the step (A), providing a film, the perforation of the film is formed by press forming, and the inner peripheral wall is bent inwardly.

In the step (E), a metal ring is further provided, the metal ring having a polished outer end surface, and the film is formed by in-mold film ejection.

In the step (B), a positioning post protruding from the die in the die cavity is bored and snapped into the consistent hole of the metal ring.

In the step (B), the master mold includes a first molding die surface defining a mold cavity and abutting against the film, and the positioning protrusion includes a protrusion protruding from the first molding die surface and piercing and engaging the through hole And a carrying shoulder protruding from the outer surface of the cylindrical portion and protruding from the outer surface of the cylindrical portion and protruding from the first molding surface, the polished outer end surface of the metal ring abutting on the carrying shoulder.

In step (D), the molten plastic injected into the cavity by the high pressure compresses the film to fit snugly to the first molding die face and the outer peripheral surface of the carrier shoulder.

In the step (D), a gap is formed between the inner peripheral wall of the film and the annular groove for the molten plastic to be filled in the annular groove.

In the step (C), the mold core includes a second molding die surface corresponding to the position of the first molding die face, and a pressing protrusion protruding from the second molding die surface, and the pressing convex column is pressed On the inner end surface of the cylinder portion and the metal ring.

Another object of the present invention is to provide a casing for simultaneously molding a casing into a film by means of in-mold molding, and a metal ring pierced through the film, thereby reducing manufacturing man-hours and improving The beauty and texture of the case.

The casing disclosed in the present invention comprises a film, a metal ring, and a casing.

The film is formed with a perforation, and an inner peripheral wall defining a perforation, the film includes an inner membrane surface; the metal ring includes an outer peripheral surface, and a ring groove formed on the outer peripheral surface, the metal ring is pierced through the perforation and the inner peripheral wall is engaged with The ring is formed in the inner surface of the film and the outer peripheral surface of the metal ring by in-mold molding.

The object of the present invention and solving the prior art problems can be further achieved by the following technical means.

The inner peripheral wall is bent inwardly.

The metal ring further includes an outer end surface connected to the outer end of the outer peripheral surface, and the film further includes an outer film surface spaced apart outside the outer end surface.

The outer end surface is a polished outer end surface that has been surface-polished.

The metal ring further includes an inner peripheral surface defining a uniform hole, and the polished outer end surface includes a lead portion connected to the inner peripheral surface.

The metal ring further includes an inner end surface connected to the inner end of the outer peripheral surface, and the housing includes an inner casing surface spaced apart inside the inner end surface.

The ring groove is formed by a radially inwardly recessed outer peripheral surface, the metal ring further includes a first groove surface defining the ring groove, and a second groove surface spaced apart from the first groove surface, the first groove surface being adjacent to the outer surface The end surface, the inner peripheral wall abuts against the first groove surface and is spaced apart from the second groove surface.

According to the above technical means, the advantages and effects of the casing of the present invention are that the casing is simultaneously molded into the film by means of in-mold forming, and is passed through the perforated metal ring of the film, thereby reducing the casing The manufacturing man-hours can enhance the appearance of the casing and the aesthetics and texture of the perforations.

The foregoing and other technical aspects, features, and advantages of the present invention will be apparent from the description of the appended claims. The technical means and functions of the present invention for achieving the intended purpose can be more deeply and specifically understood by the description of the specific embodiments. However, the drawings are only for the purpose of reference and description, and are not intended to limit 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.

As shown in FIG. 1 , it is an embodiment of the casing of the present invention. The casing 100 is applied to an electronic product (for example, a mobile phone, a notebook computer, a tablet computer, a personal digital assistant, etc.), in this embodiment. The casing 100 is exemplified by a battery cover of a mobile phone.

As shown in FIG. 2, FIG. 3 and FIG. 4, the casing 100 includes a film 1, a metal ring 2, and a casing 3. The film 1 is formed with a perforation 11 and an inner peripheral wall 12 defining a perforation 11 which includes an inner membrane surface 13. The metal ring 2 includes an outer peripheral surface 21 and a ring groove 22 formed on the outer peripheral surface 21. The metal ring 2 is bored through the through hole 11 of the film 1, and the inner peripheral wall 12 of the film 1 is engaged with the ring groove 22 of the metal ring 2. Inside. The casing 3 is formed on the inner film surface 13 of the film 1 and the outer circumferential surface 21 of the metal ring 2 by means of insert molding. A special pattern, pattern or color is formed through the film 1, and the metal ring 2 gives the perforation 11 a metallic luster effect, whereby the appearance of the casing 100 and the appearance and texture of the perforation 11 can be improved.

The manufacturing method of the casing 100 will be described in detail below. As shown in FIG. 5, FIG. 5 is a flowchart of a manufacturing method of a preferred embodiment of the casing 100 of the present invention. The main flow shown in FIG. 5 is as follows: 5 and FIG. 6, as shown in step 91, a film 1 is provided.

The perforation 11 of the film 1 is formed by an outward-inward press forming method through a punch (not shown), that is, the punch is punched from the outer film surface 14 of the film 1 toward the inner film surface 13 After the film 1 is pressed, the inner peripheral wall 12 is bent inwardly (that is, the burrs are bent). In the present embodiment, the film 1 is formed by a film in-mold ejection method (IMF), and therefore, the film 1 can exhibit a special pattern, pattern or color.

In addition, a metal ring 2 is further provided in step 91. The metal ring 2 is formed by machining a computer numerical control (CNC) machine tool. The metal ring 2 further includes an outer end surface 23 connected to the outer end of the outer peripheral surface 21, In the embodiment, the outer end surface 23 is a polished outer end surface which is subjected to surface polishing treatment, whereby the outer end surface 23 of the metal ring 2 can exhibit a relatively bright metallic luster.

The metal ring 2 further includes an inner end surface 24 connected to the inner end of the outer peripheral surface 21, and an inner peripheral surface 25 formed between the outer end surface 23 and the inner end surface 24. The inner peripheral surface 25 defines a through outer end surface 23 and an inner end surface. In the embodiment, the through hole 26 is a lens hole corresponding to the position of the lens (not shown), whereby the lens can capture the image of the outside of the casing 100 through the through hole 26. Of course, as the casing 100 is applied to different types of electronic products, the function of the through hole 26 will also change. For example, the through hole 26 may also be a horn hole corresponding to the position of the speaker (not shown), or It is a jack corresponding to the position of the input/output port (not shown). More specifically, the outer end surface 23 of the metal ring 2 (that is, the polished outer end surface) includes a lead-shaped portion 231 which is inclined to be connected to the inner peripheral surface 25, and the design of the lead-through portion 231 allows the metal ring 2 to appear. A multi-layered sense of hierarchy.

As shown in FIG. 5 and FIG. 7, as shown in step 92, the metal ring 2 is inserted into the through hole 11 of the film 1, so that the film 1 defines the inner peripheral wall 12 forming the through hole 11 to be engaged with the outer peripheral surface 21 of the metal ring 21. Inside the ring groove 22.

In the process of assembling the metal ring 2, the metal ring 2 is aligned with the through hole 11 of the film 1 by the assembler, and then the metal ring 2 is inserted into the through hole 11 in the direction of the arrow V, when the outer circumferential surface 21 of the metal ring 2 When the inner peripheral wall 12 of the film 1 is touched, the inner peripheral wall 12 is stretched outward to be deformed. When the metal ring 2 is moved to a position where the ring groove 22 is aligned with the inner peripheral wall 12, the inner peripheral wall 12 can return to the initial position and be engaged in the ring groove 22 by the action of the return elastic force.

In the present embodiment, the annular groove 22 is formed by a radially inwardly recessed outer peripheral surface 21, and the metal ring 2 further includes a first groove surface 221 defining the annular groove 22, and a space spaced from the first groove surface 221 The second groove surface 222, the first groove surface 221 is adjacent to the outer end surface 23, the second groove surface 222 is adjacent to the inner end surface 24, and the width between the first groove surface 221 and the second groove surface 222 is greater than that of the inner peripheral wall 12. The thickness is such that the inner peripheral wall 12 of the film 1 is movably engaged within the annular groove 22.

As shown in FIG. 5, FIG. 8, FIG. 9, and FIG. 10, as shown in step 93, the film 1 and the metal ring 2 are placed in a cavity 411 of a master mold 41.

In order to allow the film 1 and the metal ring 2 to be stably positioned in the cavity 411 without displacement or shaking after being placed in the cavity 411, in the present embodiment, a protrusion of the female die 41 is provided in the cavity 411. The positioning post 412 is inserted into the through hole 26 of the metal ring 2, and is inserted into the through hole 26 through the positioning protrusion 412, so that the film 1 and the metal ring 2 can be stably positioned in the die. There is no displacement or sway in the hole 411.

Further, the female mold 41 includes a first molding surface 413 defining a cavity 411 and abutting against the film 1. The positioning protrusion 412 includes a protrusion protruding from the first molding surface 413 and is inserted and engaged The cylindrical portion 414 of the through hole 26 and a carrying shoulder portion 415 projecting radially outward from the outer surface of the cylindrical portion 414 and projecting from the first molding surface 413. In the present embodiment, the diameter of the through hole 26 is equivalent to the outer diameter of the cylindrical portion 414 of the positioning boss 412, so that the cylindrical portion 414 can pass through the through hole 26 and be engaged with the through hole 26. The polished outer end face 23 of the metal ring 2 abuts against the carrier shoulder 415 such that an outer end edge 27 where the outer end face 23 is joined to the outer peripheral face 21 is spaced from the first profiled die face 413. Further, the outer diameter of the metal ring 2 is equivalent to the outer diameter of the carrying shoulder 415, so that the outer peripheral surface 21 of the metal ring 2 can be aligned with the outer peripheral surface of the carrying shoulder 415.

As shown in FIG. 5, FIG. 11, FIG. 12 and FIG. 13, as shown in step 94, a male mold 42 is clamped to the female mold 41, so that a mold core 421 of the male mold 42 is matched with the mold cavity 411 and formed. A cavity 410.

In this embodiment, the mold core 421 includes a second molding surface 422 corresponding to the position of the first molding surface 413 of the female mold 41, and a pressing protrusion protruding from the second molding surface 422. 423, when the male mold 42 is clamped with the female mold 41, the pressing protrusion 423 is pressed against the cylindrical portion 414 of the female mold 41 and the inner end surface 24 of the metal ring 2. The outer end surface 23 of the metal ring 2 is abutted against the carrying shoulder 415 of the female mold 41, and the pressing protrusion 423 is pressed against the inner end surface 24 of the metal ring 2, thereby limiting the metal ring 2 up or down Moving to prevent the metal ring 2 from being displaced by the impact of the molten plastic 30 (shown in Figure 15) injected into the cavity 410.

As shown in FIG. 5, FIG. 14, FIG. 15, and FIG. 16, as shown in step 95, the molten plastic 30 is injected into the cavity 410, and the molten plastic 30 is filled on the film 1 and the metal ring 2, and is formed after curing. The housing 3 is integrally formed on the film 1 and the metal ring 2.

In the present embodiment, the molten plastic 30 is injected at a high pressure via a gate 424 of the male mold 42, and the molten plastic 30 flows into the cavity 410 through the guiding of the gate 424, and the molten plastic 30 injected by the high pressure compresses the film. 1 is closely attached to the first molding surface 413 of the female mold 41 and the outer circumferential surface of the carrying shoulder 415, and the inner peripheral wall 12 is closely attached to the first groove surface 221 and spaced apart from the second groove surface 222. Thereby, the inner peripheral wall 12 of the film 1 forms a gap 223 with the annular groove 22 to fill the molten plastic 30 in the annular groove 22.

As shown in FIG. 15, FIG. 16, and FIG. 17, when the molten plastic 30 is completely filled in the cavity 104, the molten plastic 30 is stopped. After the molten plastic 30 is solidified, the inner film surface 13 integrally formed on the film 1 is formed. And a housing 3 on the outer peripheral surface 21 (shown in FIG. 4) of the metal ring 2. Next, the male mold 42 is separated from the master mold 41, and the manufactured casing 100 can be taken out.

As shown in FIGS. 3, 4, 16, and 17, since the outer end surface 23 of the metal ring 2 abuts against the carrier shoulder 415 and is spaced apart from the first molding die surface 413 during the manufacturing process, Therefore, after the casing 100 is formed, the outer film surface 14 of the film 1 is spaced outside the outer end surface 23 of the metal ring 2, so that the film 1 can cover the outer edge 27 of the metal ring 2, thereby avoiding use. The person is cut or scratched by the outer end edge 27 of the metal ring 2 during use of the electronic product. On the other hand, since the inner end surface 24 of the metal ring 2 abuts against the pressing protrusion 423 and is spaced apart from the second molding die surface 422, the casing 100 is formed inside the casing 3 after molding. The shell surface 31 is spaced apart inside the inner end surface 24 of the metal ring 2, thereby preventing the assembler from cutting an inner end edge 28 where the outer peripheral surface 21 of the metal ring 2 is joined to the inner end surface 24 when assembling the casing 100. Injury or scratching.

In summary, in the casing 100 of the present embodiment, the casing 3 is simultaneously molded into the film 1 by in-mold molding, and is passed through the metal ring 2 of the perforation 11 of the film 1, whereby the casing can be lowered. The manufacturing man-hour of 100 can improve the appearance of the casing 100 and the appearance and texture of the perforation 11, so that the object of the present invention can be achieved.

However, the above is only the 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 still It is within the scope of the patent of the present invention.

〔this invention〕

100‧‧‧Chassis

1‧‧‧film

11‧‧‧Perforation

12‧‧‧ inner wall

13‧‧‧Intimal surface

14‧‧‧ outer membrane surface

2‧‧‧Metal ring

21‧‧‧ outer perimeter

22‧‧‧ Ring groove

221‧‧‧ first groove surface

222‧‧‧Second groove surface

223‧‧‧ gap

23‧‧‧Outer end face

231‧‧‧ lead corner

24‧‧‧ inner end

25‧‧‧ inner circumference

26‧‧‧through holes

27‧‧‧ outer edge

28‧‧‧ inner edge

3‧‧‧Shell

31‧‧‧ inner shell

41‧‧‧Female model

410‧‧‧ cavity

411‧‧‧ cavity

412‧‧‧ positioning stud

413‧‧‧First molding surface

414‧‧‧Cylinder Department

415‧‧‧ carrying shoulder

42‧‧‧Male model

421‧‧‧Men

422‧‧‧Second molding surface

423‧‧‧Resisting studs

424‧‧‧Spindle

V‧‧‧ arrow

Figure 1 is a perspective view of an embodiment of a casing of the present invention;

2 is an exploded perspective view of an embodiment of the casing of the present invention, illustrating the assembly relationship of the film, the metal ring, and the casing;

Figure 3 is a cross-sectional view taken along line I-I of Figure 1, illustrating the housing formed on the film and the metal ring;

Figure 4 is a partial enlarged view of Figure 3;

Figure 5 is a flow chart showing a manufacturing method of an embodiment of the casing of the present invention;

Figure 6 is a partial cross-sectional view showing an embodiment of the casing of the present invention, illustrating the state of the film and the metal ring when it is disassembled;

Figure 7 is a partial cross-sectional view showing an embodiment of the casing of the present invention, illustrating that the metal ring is bored in the perforation of the film;

Figure 8 is a top plan view of an embodiment of the casing of the present invention, illustrating the film and the metal ring placed in the cavity of the master mold;

Figure 9 is a cross-sectional view showing an embodiment of the casing of the present invention, illustrating the film and the metal ring placed in the cavity of the master mold;

Figure 10 is a partial enlarged view of Figure 9;

Figure 11 is a top plan view of an embodiment of the casing of the present invention, illustrating the clamping of the male mold and the female mold;

Figure 12 is a cross-sectional view taken along line II-II of Figure 11, illustrating the male mold and the master mold clamping, the outer end surface of the metal ring is pressed against the carrying shoulder, and the inner end surface is pressed against the pressing convex column;

Figure 13 is a partial enlarged view of Figure 12, illustrating that the outer end surface of the metal ring is pressed against the carrying shoulder, and the inner end surface is pressed against the pressing stud;

Figure 14 is a cross-sectional view taken along line III-III of Figure 11, illustrating that the mold of the male mold cooperates with the cavity of the master mold and forms a cavity;

Figure 15 is a cross-sectional view similar to Figure 14 illustrating the injection of molten plastic into the mold cavity via a sprue;

Figure 16 is a partial enlarged view of an embodiment of the casing of the present invention, illustrating that the molten plastic is filled in the annular groove via the gap;

Figure 17 is a cross-sectional view showing an embodiment of the casing of the present invention, illustrating the formation of a housing integrally formed on the film and the metal ring after the molten plastic is cured.

1. . . film

11. . . perforation

12. . . Inner peripheral wall

14. . . Outer membrane surface

2. . . metal ring

twenty one. . . Peripheral surface

twenty two. . . Ring groove

221. . . First groove surface

222. . . Second groove surface

twenty three. . . Outer end face

231. . . Leading section

twenty four. . . Inner end face

25. . . Inner circumference

26. . . Through hole

27. . . Outer edge

28. . . Inner edge

3. . . case

31. . . Inner shell surface

Claims (14)

A method of manufacturing a casing, comprising the steps of: (A) inserting a metal ring into a perforation of a film, and defining an inner peripheral wall of the film defining the perforation to engage with an outer peripheral surface of the metal ring; (B) placing the film and the metal ring in a cavity of a female mold; (C) clamping a male mold with the female mold to make a mold core of the male mold and the mold cavity Cooperating and forming a cavity; and (D) injecting molten plastic into the cavity, filling the film with the metal ring and curing, and forming a film integrally formed on the film and the metal ring after curing a housing; in the step (B), a positioning post protruding from the die in the die is pierced and engaged in a consistent hole of the metal ring, the master comprises a defining die a hole and a first molding die surface against which the film abuts. The method for manufacturing a casing according to claim 1, further comprising a step (E) before the step (A), the film is provided, and the perforation of the film is formed by press forming. The inner peripheral wall is bent inwardly. The method of manufacturing a casing according to claim 2, wherein in the step (E), the metal ring is further provided, the metal ring having a polished outer end surface, and the film is in a film in-mold injection manner. Made. The manufacturing method of the casing according to the third aspect of the invention, wherein, in the step (B), the positioning protrusion comprises a protrusion protruding from the first molding surface and being pierced and engaged a cylinder portion of the hole, and a cylinder portion The outer surface protrudes radially outwardly and protrudes from the carrying shoulder of the first molding die surface, and the polished outer end surface of the metal ring abuts against the carrying shoulder. The method of manufacturing a casing according to claim 4, wherein in the step (D), the molten plastic injected into the cavity by high pressure compresses the film to be in close contact with the first molding die. The surface and the outer peripheral surface of the carrying shoulder. The method of manufacturing a casing according to claim 5, wherein in the step (D), a gap is formed between the inner peripheral wall of the film and the annular groove for filling the ring in the molten plastic. . The manufacturing method of the casing according to claim 6, wherein in the step (C), the mold core comprises a second molding die surface corresponding to the position of the first molding die face, and a And a pressing protrusion protruding from the second molding surface, the pressing protrusion is pressed against the cylindrical portion and an inner end surface of the metal ring. A casing comprising: a film formed with a perforation, and an inner peripheral wall defining the perforation, the film including an inner membrane surface; a metal ring including an outer peripheral surface, and a ring groove formed on the outer circumferential surface The metal ring is disposed in the through hole and the inner peripheral wall is engaged in the annular groove; and a casing is formed in an in-mold shape on the inner film surface of the film and the outer circumferential surface of the metal ring. The casing according to claim 8, wherein the inner peripheral wall is bent inwardly. The casing of claim 9, wherein the metal ring further comprises an outer end surface connected to the outer end of the outer peripheral surface, the film further comprising an outer film surface spaced apart outside the outer end surface. The casing of claim 10, wherein the outer end surface is a polished outer end surface that has been surface-polished. The casing of claim 11, wherein the metal ring further comprises an inner peripheral surface defining a uniform hole, the polished outer end surface including a lead portion connected to the inner peripheral surface . The casing of claim 10, wherein the metal ring further comprises an inner end surface connected to an inner end of the outer peripheral surface, the housing including an inner casing surface spaced apart inside the inner end surface. The casing of claim 10, wherein the annular groove is formed by the inner circumferential surface being recessed radially inward, the metal ring further comprising a first groove surface defining the annular groove, and a a second groove surface spaced apart from the first groove surface, the first groove surface being adjacent to the outer end surface, the inner circumferential wall abutting against the first groove surface and spaced apart from the second groove surface.