Improved double-color lampshade and forming mold thereof

Abstract

The utility model discloses an improved two-color lampshade and a forming mould thereof, the two-color lampshade comprises a first injection molding part and a second injection molding part, the first injection molding part is positioned on one side of the second injection molding part, a parting surface is arranged between the whole first injection molding part and the whole second injection molding part, and the parting surface is of a coherent smooth structure. According to the technical scheme, the first-shot injection molding part is located on one side of the second-shot injection molding part, the first-shot injection molding part is of a smooth structure and is not provided with a bent corner, and therefore the parting surface between the whole first-shot injection molding part and the whole second-shot injection molding part is of a coherent smooth structure. According to the double-color lampshade, the limitation of a bending corner on the one-shot injection molding part is avoided, air existing between the one-shot injection molding part and the one-shot injection molding part is not trapped, the risks of defects such as bright lines, cracking and irregular molding lines of the appearance of the molded lampshade caused by trapped air are eliminated, and the gas flowing trend is improved, so that the double-color lampshade is better molded.

Description

Technical Field

[0001] The utility model belongs to the technical field of lamps, and in particular relates to an improved two-color lampshade and a forming mold thereof. Background Art

[0002] Currently on the market, the design of car lights tends to be slender, the risk of air entrapment is greatly increased, and the structure is limited. The original optimization ideas can no longer meet the product molding needs.

[0003] like Figure 1 It is shown that the two-color lampshade is affected by the flip-chip molding of the product. When the two-shot injection molding is carried out, it is easy to cause defects such as air entrapment and bright lines at the corners of the one-shot injection molding. Usually, the wall thickness of the two-shot molded parts is adjusted, the filling trend is optimized, and the risk of air entrapment is reduced.

[0004] However, the commonly used optimization approach currently used to adjust the wall thickness of two-shot molded parts will result in product shapes that are inconsistent with the original design; and the slender shape greatly increases the risk of air entrapment. Utility Model Content

[0005] In order to solve the technical problem in the background technology that air is easily trapped at the corner of one shot of a two-shot injection molded part in a two-shot lampshade, the purpose of the utility model is to provide an improved two-shot lampshade and a molding mold thereof, which can solve the above problem.

[0006] The technical solution for achieving the purpose of the utility model is: an improved two-color lampshade and its molding mold, the two-color lampshade includes a one-shot injection molded part and a two-shot injection molded part, the one-shot injection molded part is located on one side of the two-shot injection molded part, and there is a parting surface between the one-shot injection molded part as a whole and the two-shot injection molded part as a whole, and the parting surface is a coherent and smooth structure.

[0007] In the technical solution, the one-shot injection molded part is located on one side of the two-shot injection molded part, and the one-shot injection molded part is a smooth structure without bending corners, so the parting surface between the one-shot injection molded part as a whole and the two-shot injection molded part as a whole is a continuous and smooth structure. Without the bending corner restriction on the one-shot injection molded part, the air between the two will not be trapped there, eliminating the risk of defects such as bright lines, cracks and uneven molding lines on the lampshade after molding due to trapped air, and improving the gas flow trend so that the two-color lampshade can be better molded.

[0008] Furthermore, the molding mold has a slider, and the slider abuts against the other side of the two-shot injection molded part, and the two-shot injection molded part is located between the slider and the one-shot injection molded part. Since the one-shot injection molded part in this solution has no bending corners and only exists on one side of the two-shot injection molded part, the two-shot injection molded part lacks support, and the slider can support the molding of the two-shot injection molded part to ensure that there is no obvious difference in the shape of the two-shot injection molded part after molding; in addition, as a part of the mold, the shape of the slider can be freely set, or the slider can be provided with exhaust grooves, etc., to further discharge the air near the one-shot injection molded part and the two-shot injection molded part during the molding process of the lampshade in the mold, thereby increasing the exhaust effect. In practical applications, as a part of the mold, the slider can also play a role in sealing and ensuring the sealing of the mold.

[0009] Furthermore, the slider has a plurality of slider heads, and there are gaps between the slider heads. The slider heads abut against the two-shot injection molded part, thereby increasing the exhaust gap and space between the slider and the two-shot injection molded part, and further playing an exhaust role. The slider head can be an integral structure with the slider, or can be fixed to the slider body by bolts or the like.

[0010] Furthermore, the molding mold is provided with an exhaust groove to exhaust the air near the first-shot injection molded part and the second-shot injection molded part during the molding process of the lampshade in the mold, thereby eliminating the adverse effects of trapped air on molding.

[0011] Furthermore, the exhaust groove includes a first exhaust groove and a second exhaust groove, the first exhaust groove is located at the parting surface, and the second exhaust groove is located on the slider. The first exhaust groove located at the parting surface will directly exhaust the gas around the first injection molded part and the second injection molded part, and the second exhaust groove located on the slider will assist in exhausting the air on the side of the second injection molded part away from the first injection molded part, further reducing the problem of trapped air in the molding cavity.

[0012] By adopting the above technical solution, the utility model has the following beneficial effects:

[0013] (1) The one-shot injection molded part in this solution eliminates the traditional bending corner structure, reducing and lowering the risk of air entrapment at the bending corner position;

[0014] (2) In order to solve the problem of removing the traditional bending corner structure of the first-shot injection molded part from the second-shot injection molded part, a slider is added on the other side of the second-shot injection molded part, which not only plays a supporting role, but also increases the exhaust structure to reduce trapped air;

[0015] (3) A first exhaust groove is added at the parting surface between the first-shot injection molded part and the second-shot injection molded part to further solve the problem of air accumulation there;

[0016] (4) A second exhaust groove is provided on the slider to further reduce the air flow problem in the mold cavity during molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the structure of a single shot injection molded part and a double shot injection molded part in the current traditional lampshade of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the first-shot injection molded part and the second-shot injection molded part in the injection mold of the utility model;

[0020] Figure 3 This is a structural schematic diagram of the slider in the utility model.

[0021] The numbers in the accompanying drawings are: 1 one-shot injection molded part; 2 two-shot injection molded part; 3 slider; 4 bending corner; 5 parting surface; 6 slider head. DETAILED DESCRIPTION

[0022] Example:

[0023] like Figure 2 As shown, this embodiment provides an improved two-color lampshade and its molding mold, the two-color lampshade includes a one-shot injection molded part 1 and a two-shot injection molded part 2, the one-shot injection molded part 1 is located on one side of the two-shot injection molded part 2, and there is a parting surface 5 between the one-shot injection molded part 1 as a whole and the two-shot injection molded part 2 as a whole, and the parting surface 5 is a coherent and smooth structure. In this technical solution, the one-shot injection molded part 1 is located on one side of the two-shot injection molded part 2, and the one-shot injection molded part 1 is a smooth structure without a bending corner 4, so the parting surface 5 between the one-shot injection molded part 1 as a whole and the two-shot injection molded part 2 as a whole is a coherent and smooth structure. Without the restriction of the bending corner 4 on the one-shot injection molded part 1, the air between the two will not be trapped there, eliminating the risk of defects such as bright lines, cracking and uneven molding lines on the appearance of the lampshade after molding caused by trapped air, and improving the gas flow trend, so that the two-color lampshade can be better molded.

[0024] Preferably, the molding mold has a slider 3, the slider 3 abuts against the other side of the two-shot injection molded part 2, and the two-shot injection molded part 2 is located between the slider 3 and the one-shot injection molded part 1. Since the one-shot injection molded part 1 in this solution does not have a bending corner 4 and only exists on one side of the two-shot injection molded part 2, the two-shot injection molded part 2 lacks support, and the slider 3 can support the molding of the two-shot injection molded part 2 to ensure that there is no obvious difference in the shape of the two-shot injection molded part 2 after molding; in addition, as a part of the mold, the shape of the slider 3 can be freely set, or the slider 3 can be provided with an exhaust groove, etc., to further discharge the air near the one-shot injection molded part 1 and the two-shot injection molded part 2 during the lampshade molding process in the mold, thereby increasing the exhaust effect. In practical applications, the slider 3, as a part of the mold, can also play a role in sealing and ensuring the sealing of the mold.

[0025] like Figure 3 As shown, the slider 3 has a plurality of slider heads 6, and there are gaps between the plurality of slider heads 6. The slider heads 6 abut against the two-shot injection molded part 2, thereby increasing the exhaust gap and space between the slider 3 and the two-shot injection molded part 2, and further playing an exhaust role. The slider head 6 can be an integral structure with the slider 3, or can be fixed to the slider 3 body by bolts or the like.

[0026] Preferably, the molding mold has an exhaust groove to exhaust the air near the first-shot injection molded part 1 and the second-shot injection molded part 2 during the lampshade molding process in the mold, thereby eliminating the adverse effects of trapped air on molding. The exhaust groove includes a first exhaust groove and a second exhaust groove, wherein the first exhaust groove is located at the parting surface 5, and the second exhaust groove is located on the slider 3. The first exhaust groove located at the parting surface 5 will directly exhaust the gas around the first-shot injection molded part 1 and the second-shot injection molded part 2, and the second exhaust groove located on the slider 3 will assist in exhausting the air on the side of the second-shot injection molded part 2 away from the first-shot injection molded part 1, thereby further reducing the problem of trapped air in the molding cavity.

[0027] Working principle: When the two-color lampshade in this scheme is formed in the injection mold, the one-shot injection molded part 1 has no bending corner 4, the one-shot injection molded part 1 is located on one side of the two-shot injection molded part 2, and the slider 3 is located on the other side of the two-shot injection molded part 2, eliminating the air trapping problem caused by the bending corner 4 in the traditional two-color lampshade; and a first exhaust groove is arranged at the parting surface 5 between the one-shot injection molded part 1 and the two-shot injection molded part 2, and a second exhaust groove is arranged on the slider 3, further reducing the possible air trapping problem.

[0028] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An improved two-color lampshade and its forming mold, characterized in that: The two-color lampshade comprises a first-shot injection molded part (1) and a second-shot injection molded part (2), wherein the first-shot injection molded part (1) is located on one side of the second-shot injection molded part (2), and a parting surface (5) is provided between the first-shot injection molded part (1) as a whole and the second-shot injection molded part (2) as a whole, wherein the parting surface (5) is a continuous and smooth structure.

2. An improved two-color lampshade and its forming mold according to claim 1, characterized in that: The molding die is provided with a slider (3), and the slider (3) abuts against the other side of the two-shot injection molded part (2).

3. The improved two-color lampshade and its forming mold according to claim 2, characterized in that: The slider (3) is provided with a plurality of slider heads (6), gaps are provided between the plurality of slider heads (6), and the slider heads (6) abut against the two-shot injection molded part (2).

4. The improved two-color lampshade and its forming mold according to claim 2, characterized in that: The molding die is provided with an exhaust groove.

5. The improved two-color lampshade and its forming mold according to claim 4, characterized in that: The exhaust groove comprises a first exhaust groove and a second exhaust groove, wherein the first exhaust groove is located at the parting surface (5), and the second exhaust groove is located on the slider (3).

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