TW201702042A - Insert molding method of thermoforming integrally formed metal shell which can lower cost, enhance processing precision, and effectively avoid defective goods - Google Patents

Abstract

An insert molding method of thermoforming integrally formed metal shell is presented. CNC processing for insulation is performed to the concave slot shaped curved surface of the integrally thermoformed metal shell after anodic treatment. Further, the desired position on the inner layer is etched or laser engraved, and then glued. The through holes in the concave slots of the metal shell are reserved with the same spacing. When being injection molded, plastic material flows to reserved through holes of the metal shell; and then flows out through the concave slots to be insert molded into an integrally thermoformed metal shell.

Description

Thermoplastic integrated metal shell embedding method

The metal shell embedding method of the thermoplastic integrated molding of the invention is mainly applied to the molding technology of the metal shell embedding plastic formed by thermoplastic molding.

According to the traditional metal shell, it is not formed in one piece, but is divided into several pieces and then combined into one. At the same time, the traditional method of embedding the plastic in the metal shell is mainly to first process the metal shell rough embryo through the CNC. After the anode treatment, the metal shell is taken out to shoot the plastic, which is not only expensive to manufacture, but also wears after a period of time, causing the machining tolerance to increase in tolerance, resulting in defective products. At the same time, the anodized chemical will also erode metal and plastic, which is one of the problems and defects that have yet to be solved.

Moreover, the above-mentioned conventional metal shell embedding plastic means that when the plastic is shot, the plastic is easy to be raised more than the metal shell, and the hand is touched, and the touch is not good, which is still a problem to be solved. And the second missing.

The present inventor is currently engaged in the manufacture and design of related products, accumulating practical experience and experience for many years, and actively investing in the spirit of innovation and improvement in order to solve the existing problems and lack of traditional metal shell embedded plastics. One-piece metal shell embedding method.

The invention solves the problem. The technical means applied and the effect of the prior art are as follows: the metal plate is first placed in the lower die, the ring is surrounded by a ring-shaped groove, the spacer is placed in the groove, and the spacer is placed. The surface is higher than the plane of the lower mold, and the metal plate is first placed on the top surface of the isolation gasket, and the upper mold is moved downward to apply a certain pressure to the metal plate, and the lower mold and the upper mold are heated to a proper temperature by using a heating device. The molding is deformed, and the pressure of the high-pressure gas is input from the upper mold to blow the molded plastic material into the cavity from the top to the bottom. After the molding, the isolation gasket is not separated from the cavity. It is easy to remove the film, and the excess part is cut off after the finished product is taken out, that is, the finished metal shell product is obtained; not only the production cost is low, but also the processing precision is improved, the product can be effectively avoided, and the effect is improved. A person who achieves his purpose.

The technical means applied by the invention solves the problem 2 and the efficacy of the prior art is as follows: the thermoplastic molded one-piece metal shell finished product is insulated by CNC machining in the groove-shaped arc surface of the metal shell after being processed by the anode, and then The inner layer must be etched or laser-engraved at the position of the inner layer, and smeared at the inner layer etching treatment or laser engraving processing, and the through holes of the same pitch are reserved in the groove of the metal shell. The two sides are processed into a micro-plane, and a curved mold having the same shape as the metal shell is disposed on the plane. Both sides of the curved mold are slightly larger than the two sides of the groove, and a spring is placed behind the mold, and the plastic is merged into the molding. The through hole reserved for the metal shell is integrally formed by the outward flow of the metal through the groove, and is pushed outward when the plastic touches the curved mold. At this time, the curved mold is made of plastic by the elasticity of the rear spring. The external pushing distance is limited, and the plastic overflow tolerance is within an acceptable range. The hand is touched, the touch is excellent, and the effect is improved, and the purpose is the second.

10‧‧‧Down

11‧‧‧下模穴

12‧‧‧Circle groove

13‧‧‧Isolation washer

20‧‧‧上模

21‧‧‧上模穴

22‧‧‧High pressure gas input pipe

30‧‧‧Metal sheet

31‧‧‧Metal shell

32‧‧‧ Groove

321‧‧‧ curved surface

322‧‧‧etching or laser engraving

323‧‧ ‧ glue

33‧‧‧through hole

34‧‧‧ plane

35‧‧‧Arc mould

40‧‧‧ plastic

S‧‧ ‧ spring

The first picture shows the action of placing the metal plate on the top surface of the isolation gasket.

The second figure is a schematic diagram of the action of molding the metal plate into a metal shell after the upper mold is clamped down to the lower mold, heated and input with high pressure gas.

The third figure is a schematic diagram of the action of the upper mold opening the mold on the lower mold.

Figure 4: Schematic diagram of the action taken after the metal shell is formed and taken out from the lower mold cavity.

Fig. 5 is a schematic view showing the action of the plastic flowing to the through hole reserved for the metal shell when the injection molding is performed, and flowing out through the groove.

Figure 6: When the plastic is shot and molded, the plastic pushes outward after pushing the curved mold. At this time, the curved mold is driven by the elasticity of the rear spring, so that the plastic can push the distance to be restricted.

Figure 7: A three-dimensional diagram of a metal shell.

Figure 8: A three-dimensional schematic diagram of a metal shell embedded plastic.

The ninth picture is a schematic diagram of the sectional combination of the finished product.

Figure 10 is a schematic diagram of the production process of the present invention.

In order to make it easier for those skilled in the art to understand the art to understand the construction contents of the present invention and the functional benefits that can be achieved, a specific embodiment will be listed and described in detail with reference to the following: a thermoplastic integral molding For the metal shell embedding method, please refer to the first to ninth figures. Mainly includes: lower mold 10, upper mold 20, metal sheet 30, plastic 40; wherein: The lower mold 10 is provided with a lower cavity 11 around the lower die 10, and a ring-shaped groove 12 is disposed around the lower die 10. The annular groove 12 is provided with an isolating washer 13; the upper die 20 corresponds to the lower die. An upper mold cavity 21 is provided at the lower mold cavity 11 of the 10, and a high-pressure gas input pipe 22 is disposed at the center of the upper mold 20 for inputting high-pressure gas; the metal plate 30 is slightly larger than the lower mold cavity of the lower mold 10. 11. The top surface of the spacer gasket 13 placed on the lower mold 10 (as shown in the first figure) is pressed against the metal sheet 30 after the upper mold 20 is moved down and the lower mold 10 is clamped. The lower mold 10 and the upper mold 20 are heated to an appropriate temperature by a heating device (not shown), and then the high-pressure gas is input from the high-pressure gas input pipe 22 of the upper mold 20, and the metal plate is pressed from the top to the bottom by the pressure of the high-pressure gas. The sheet 30 is blown into the lower mold cavity 11 (as shown in the second figure). After the molding, the upper mold 20 is opened upward to the lower mold 10 (as shown in the third figure), and the metal shell 31 is taken out from the lower mold cavity 11. (As shown in the fourth figure), the excess portion is cut off, that is, the finished metal shell 31 is obtained, and the surface of the metal shell 31 is provided with two grooves 32 above and below the surface. The metal shell 31 protrudes from the inner surface of the two recesses 32 to form a two-arc surface 321 . After the finished metal shell 31 is processed through the anode, the two-arc surface 321 of the metal shell 31 is insulated by CNC machining, and then the inner layer is required to be insulated. The position is etched or laser-engraved, and the metal shell 31 is etched or laser-engraved 322, and a plurality of through holes 33 having the same pitch are reserved in the two grooves 32, and The two sides of the groove 32 are processed into a minute plane 34, and an arc-shaped mold 35 having the same outer shape as that of the metal shell 31 is disposed on the plane 34, and both sides of the curved mold 35 are slightly larger than both sides of the groove 32, and Place a spring behind the curved mold 35 S, when the injection molding is performed, the plastic 40 is merged to the through hole 33 reserved by the metal shell 31, and flows outward through the groove 32 (as shown in FIG. 5), and is pushed outward when the plastic 40 touches the curved mold 35. At this time, the arc mold 35 is limited in the outward pushing distance of the plastic 40 by the elasticity of the rear spring S, thereby controlling the allowable amount of the plastic 40 to overflow into an acceptable range (as shown in FIG. 6), and ejecting After molding, two plastics 40 (as shown in the seventh, eighth, and ninth views) can be integrally formed on the upper and lower recesses 32 of the metal shell 31. The material of the plastic 40 can be selected from plastics.

The present invention, which is a combination of the above-described respective element structures, provides a method of embedding a metal shell by thermoplastic molding, which is shown in the tenth embodiment: a schematic diagram of the manufacturing process of the present invention. In actual production:

First, the metal plate is first placed in the lower die, the ring is surrounded by a ring-shaped groove, and the isolation gasket is placed in the groove, and the top surface of the isolation washer is higher than the lower die plane, and the metal plate is first placed on the isolation washer. The top surface, and the upper mold is applied downward to apply a certain pressure to the metal sheet, and the lower mold and the upper mold are heated to a proper temperature by a heating device to deform the molding, and then the pressure of the high pressure gas is input from the upper mold. The molded plastic material is blown downward into the cavity, and after the molding, the separator is not adhered to the cavity due to the isolation of the isolation gasket, and the excess portion is cut off after the product is taken out, that is, Get the finished metal shell finished product.

2. After the metal shell finished product is processed through the anode, it is insulated by CNC machining in the groove-shaped arc surface of the metal shell, and then the inner layer is required to be etched or laser-etched, and etched in the inner layer of the metal shell. Or laser engraving processing.

3. The through holes of the same spacing are reserved in the grooves of the metal shell, and the sides of the groove are The corner is processed into a micro plane, and an arc-shaped mold having the same outer shape as the metal shell is disposed on the plane, and both sides of the curved mold are slightly larger than the sides of the groove, and a spring is placed behind the mold.

4. When injection molding, the plastic flows to the through hole reserved for the metal shell, and flows out through the groove. When the plastic touches the curved mold, it pushes outward, and the curved mold is elasticized by the rear spring. The ability of the plastic to push outward is limited, thereby achieving an acceptable range of plastic spill tolerance.

Fifth, the finished product.

In summary, the present invention provides a method for embedding a metal shell by thermoplastic molding, which is confirmed by the inventors of the actual production and repeated operation tests, and can indeed achieve the expected functional benefits of the present invention, and at the same time For the first time in the world, there is no such thing as the creation of the industry, and it has the industrial use value. It is true that it has met the requirements of the practicality and progress of the invention patent, and has applied for the invention patent to the bureau in accordance with the provisions of the Patent Law.

31‧‧‧Metal shell

32‧‧‧ Groove

321‧‧‧ curved surface

322‧‧‧etching or laser engraving

323‧‧ ‧ glue

33‧‧‧through hole

34‧‧‧ plane

35‧‧‧Arc mould

40‧‧‧ plastic

S‧‧ ‧ spring

Claims (4)

The invention discloses a method for embedding a metal shell in a thermoplastic molding, comprising: first, placing a metal plate in a lower mold, a ring-shaped groove around the lower mold, and placing an isolation washer in the groove, the top surface of the isolation washer is higher The lower mold plane is first placed on the top surface of the spacer gasket, and the upper mold is moved downward to apply a certain pressure to the metal sheet, and the lower mold and the upper mold are heated to a proper temperature by a heating device to form the mold. After deformation, the pressure of the high-pressure gas input from the upper mold is blown into the cavity from the top to the bottom. After the molding, the isolation gasket is not adhered to the cavity and is easy to take off. After the film is taken out, the excess part is cut off, that is, the finished metal shell is obtained; second, after the metal shell product is processed through the anode, the grooved arc surface in the metal shell is insulated by CNC machining, and then The inner layer must be etched or laser engraved at the position of the inner layer, and smeared at the inner layer etching treatment or laser engraving processing; third, the through hole of the same spacing is reserved in the groove of the metal shell; When the injection is molded, the plastic flows to the metal. Reservation of the through hole, flows outwardly through a recess in the curved dies; five, finished product. A method of embedding a metal shell according to claim 1, wherein the metal shell is formed by a thermoformer. The method of embedding a metal shell according to claim 1, wherein the material of the plastic is plastic. A thermoplastic integrated molded metal shell embedding method according to claim 1, wherein: The sides of the groove of the metal shell are processed into a micro plane, and an arc-shaped mold having the same shape as that of the metal shell is disposed on the plane, and both sides of the curved mold are slightly larger than the springs placed on the sides of the curved mold on both sides of the groove, When the plastic touches the curved mold and pushes outward, the arc mold can limit the plastic pushing distance by the elasticity of the rear spring, thereby achieving an acceptable range of plastic overflow tolerance.