Patent Application
20170066169
This application claims the benefit of Korean Patent Application No. 10-2015-0126968, filed on Sep. 8, 2015 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.
1. Field
Embodiments of the present disclosure relate to a mobile phone case and a mobile phone case injection mold to manufacture the mobile phone case.
2. Description of the Related Art
A mobile phone case is usually used as a case for the rear surface of the mobile phone and is generally manufactured by injecting a molten resin into a cavity of a mobile phone case injection mold, and curing the resin.
Mobile phone cases are manufactured using a single type of resin to obtain uniform strength throughout the entire structures. If a mobile phone case is manufactured using a single type of resin, a pattern may be formed on the external surface of the mobile phone case by coating, painting, or the like.
However, the pattern formed on the external surface of the mobile phone case by coating or painting may be damaged or scraped by friction or impact caused while being used.
Therefore, it is an aspect of the present disclosure to provide a mobile phone case having a pattern that is not easily damaged, and a mobile phone case injection mold to manufacture the same.
Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the disclosure.
In accordance with one aspect of the present disclosure provides a mobile phone case injection mold including a first molding plate, a second molding plate to form a cavity corresponding to a mobile phone case to be manufactured together with the first molding plate, a first injection device to inject a first molten resin, a second injection device to inject a second molten resin formed of the same material as the first molten resin and having a different color, a first runner to guide the first molten resin, a second runner to guide the second molten resin, and a mixing runner to simultaneously guide the first and second molten resins to mix the first and second molten resins.
The mobile phone case injection mold may further include a manifold at which the first runner, the second runner, and the mixing runner are disposed.
The manifold may include a first member and a second member disposed at upper and lower sides and coupled to each other, and the first runner, the second runner, and the mixing runner are disposed between the first member and the second member.
The mobile phone case injection mold may further include a heater disposed in the manifold.
The first runner and the second runner may be arranged symmetrically at both sides of the mixing runner and join together at the mixing runner, and the injection mold may further comprise a guide part protruding toward the mixing runner, the guide part being disposed at a joining portion of the first runner and the second runner to guide molten resins.
The guide part may have a vertex arranged toward the mixing runner, a first surface disposed at one side of the vertex and facing the first runner, and a second surface disposed at the other side of the vertex and facing the second runner.
The first runner may have a greater width than the second runner.
In accordance with another aspect of the present disclosure, a mobile phone case is manufactured by mixing a first molten resin with a second molten resin formed of the same material as the first molten resin and having a different color from the first molten resin and curing a mixture of the first and second molten resins.
The mobile phone case may have an irregular pattern formed while the first and second molten resins are mixed.
The first molten resin may be injected in a greater amount than the second molten resin to form a ground color of the mobile phone case, and the second molten resin is injected in a smaller amount than the first molten resin to form a pattern of the mobile phone case.
These and/or other aspects of the disclosure will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
Hereinafter, a mobile phone case injection mold to manufacture a mobile phone case according to an embodiment will be described in detail with reference to the accompanying drawings.
Referring to
According to an embodiment, the first mold 10 is fixedly mounted on the ground, and the second mold 20 is vertically movably installed above the first mold 10. The first mold 10 and the second mold 20 are coupled to each other to form a cavity, which will be described later, in accordance with movement of the second mold 20. As illustrated in
The first mold 10 includes a first fixing plate 11 supported by the ground and a first molding plate 12 fixedly mounted on the first fixing plate 11 and having a first molding surface 12a with a shape corresponding to a first surface of the mobile phone case P to be fabricated.
The second mold 20 includes a second fixing plate 21 vertically movably installed and a second molding plate 22 fixedly mounted on the second fixing plate 21 and having a second molding surface 22a with a shape corresponding to a second surface of the mobile phone case P opposite to the first surface.
Thus, a cavity corresponding to a shape of the mobile phone case P to be fabricated is formed between the first molding surface 12a and the second molding surface 22a.
The injection devices 30A and 30B are installed at the second mold 20 located at an upper side and inject molten resins into the cavity downward. According to an embodiment, the injection devices 30A and 30B include a first injection device 30A to inject a first molten resin with a first color into the cavity and a second injection device 30B to inject a second molten resin with a second color different from the first color into the cavity. In this case, the first molten resin and the second molten resin are formed of the same material with different colors. According to an embodiment, both of the first molten resin and the second molten resin are formed of polycarbonate.
In addition, the second mold 20 includes a manifold 23 to mix the first molten resin from the first injection device 30A with the second molten resin from the second injection device 30B and a nozzle 24 to guide a mixture of the molten resins mixed in the manifold 23 to be injected into the cavity.
The manifold 23 is disposed in a space between the second fixing plate 21 and the second molding plate 22 to be spaced apart from the second fixing plate 21 and the second molding plate 22 by spacers 25.
In addition, the manifold 23 includes runners 23a, 23b, and 23c to guide and mix the first molten resin and the second molten resin from the first and second injection devices 30A and 30B.
Also, heaters 26 to generate heat are arranged in the manifold 23 such that the molten resins passing through the runners 23a, 23b, and 23c are maintained in molten states by maintaining the molten resins at a predetermined temperature or higher.
The runners 23a, 23b, and 23c include a first runner 23a to guide the first molten resin injected by the first injection device 30A, a second runner 23b to guide the second molten resin injected by the second injection device 30B, and a mixing runner 23c connected to the first runner 23a and the second runner 23b and simultaneously guiding the first molten resin from the first runner 23a and the second molten resin from the second runner 23b, as illustrated in
According to an embodiment, the first runner 23a and the second runner 23b, which are symmetrically arranged at both sides of the mixing runner 23c, join together at the mixing runner 23c. In this case, a guide part 23d protruding toward the mixing runner 23c is disposed at a joining portion of the first runner 23a and the second runner 23b to prevent the first molten resin flowing from the first runner 23a from flowing into the second runner 23b or prevent the second molten resin flowing from the second runner 23b from flowing into the first runner 23a.
The guide part 23d has a triangular shape in which one vertex is aligned toward the mixing runner 23c. A first surface of the guide part 23d disposed at one side of the vertex of the guide part 23d, arranged toward the mixing runner 23c, faces the first runner 23a and guides the first molten resin flowing from the first runner 23a into the mixing runner 23c. A second surface of the guide part 23d disposed at the other side of the vertex of the guide part 23c faces the second runner 23b and guides the second molten resin flowing from the second runner 23b into the mixing runner 23c. A length of a protruding portion of the guide part 23d is greater than widths of the first runner 23a and the second runner 23b to more completely inhibit backflows of the molten resins.
Thus, when the first and second molten resins are simultaneously injected via the first injection device 30A and the second injection device 30B, the first molten resin flowing from the first runner 23a and the second molten resin flowing from the second runner 23b are guided by the first and second surfaces of the guide part 23d to be transported to the mixing runner 23c, simultaneously. The first and second molten resins are mixed together while passing through the mixing runner 23c and injected into the cavity via the nozzle 24.
Since the first and second molten resins are formed of the same material with different colors as described above, a mixed resin of the first and second molten resins is injected into the cavity in an irregular pattern and cured in the cavity to form the mobile phone case P. Thus, the mobile phone case P fabricated by using the mobile phone case injection mold 100 according to an embodiment has an irregular pattern as shown in
In addition, since the first and second molten resins are the same material as described above, the fabricated mobile phone case P may have a uniform strength throughout the entire structure.
Although the first runner 23a and the second runner 23b have the same width according to the present embodiment, the widths thereof are not limited thereto. As illustrated in
Although the runners 23a, 23b, and 23c are provided in the manifold 23 according to the present embodiment, the embodiment is not limited thereto. The runners 23a, 23b, and 23c may also be disposed at any component of the mobile phone case injection mold depending on the structure thereof.
Although two molten resins, i.e., the first and second molten resins, are mixed according to the present embodiment, the embodiment is not limited thereto. More than two molten resins may also be mixed to form a pattern of the mobile phone case. In this case, the molten resins need to be formed of the same material with different colors.
As is apparent from the above description, the mobile phone case according to an embodiment of the present disclosure has a pattern formed by mixing the first and second molten resins, which are the same material with different colors, and curing the mixture, the pattern is not easily damaged. Although the pattern is damaged, a damaged portion is not easily distinguishable from the pattern formed inside the mobile phone case P.
In addition, since the first and second molten resins are the same material, the mobile phone case may have a uniform strength throughout the entire structure.
Although a few embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2015-0126968 | Sep 2015 | KR | national |
