Patent Application
20080048360
The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.
In
The first molding assembly 40 comprises a first male part 41 and a fixed first female part 42 having a first inner cavity 44. The second molding assembly 50 comprises a second male part 51 and a fixed second female part 52 having a second inner cavity 53. The second male part 51 of the second molding assembly 50 has same shape with the first male part 41 of the first molding assembly 40, and the second male part 51 and the first male part 41 are rotatably interchanged therebetween. The fixed second female part 52 of the second molding assembly 50 has a shape different from that of the first female part 42 of the first molding assembly 40.
The method for forming the front shell 54 comprises the following steps.
First, a first film 43 with a pattern (not shown in Figs.) is provided. The pattern is printed on a surface of the first film 43 via an ink-printing method. Second, the first and second molding assemblies 40 and 50 are in an open mode and the first film 43 is manually or mechanically disposed in the first inner cavity 44 of the fixed first female part 42.
Third, the first and second molding assemblies 40 and 50 are in a closed mode. The plastic material, e.g. PMMA (Poly Methyl Methaclylate) having plastic formation temperature at 190-250° C., PC (Polycarbonate) having plastic formation temperature at 230-270° C. or PET (Poly hylene terphthalate) having a plastic formation temperature at 250-275° C., is injected into a third cavity 45 formed between the first male part 41 and the first film 43 located in the fixed first female part 42. The injected plastic material between the first male part 41 and the first female part 42 to form a compact 46 bonding with the first film 43, thus to form a first window lens 47 (shown in
Fourth, the first and second molding assemblies 40 and 50 are open to rotatably interchange the first and second male parts 41 and 51 therebetween, to pair the first male part 41 and the second female part 52 and to pair the second male part 51 and the first female part 42. Thus, the first window lens 47 is moved with the first male part 41.
Fifth, a second film 43′ is manually or mechanically provided in the first inner cavity 44 of the first female part 42.
Sixth, the plastic material is simultaneously injected into the first and second male parts 41 and 51, i.e., the second inner cavity 53 of the second female part 52 and a fourth cavity 48 formed between the second male part 51 and the second film 43′ located in the fixed first female part 42 to form an outer shell 49 (shown in
Finally, the first and second molding assemblies 40 and 50 are open to remove the front shell 54.
In
Thus, based on the described method for forming the front shell 54, the thickness of the mobile communication device is reduced by eliminating self-adhesive zones; the assembling process is simplified by eliminating the process of self-adhesive zones by double-assembly manually and assembling hour and labor can be reduced; the structure of the mobile communication device is strengthened by the front shell integrally formed by the outer shell and the first window lens; total cost can be reduced by using a single double injection molding machine; the yield can be increased.
While the invention has been described by way of example and in terms of the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
