Ceiling lamp base injection mold

Abstract

The utility model provides a ceiling lamp base injection mold, and belongs to the technical field of molds. The problems that an existing ceiling lamp base is not smooth in the demolding process and is prone to being damaged are solved. The ceiling lamp base injection mold comprises an upper mold body and a lower mold body, a mold core is arranged in the middle of a lower mold plate and comprises a horizontally-arranged circular forming face, a forming protrusion is arranged in the middle of the circular forming face, an annular forming face is arranged on the periphery of the circular forming face, and the annular forming face is conical. The ejector pins comprise a first ejector pin group, a second ejector pin group and a third ejector pin group, the upper end of the first ejector pin group is arranged on the annular forming surface in a penetrating manner, the upper end of the second ejector pin group is arranged on the circular forming surface in a penetrating manner, and the upper end of the third ejector pin group is arranged on the forming bulge in a penetrating manner. According to the structure, the three parts of the ceiling lamp base are stressed at the same time, the ceiling lamp base can be conveniently, rapidly and smoothly ejected out, meanwhile, the ceiling lamp base cannot deform, and the yield of the ceiling lamp base after demolding is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and particularly relates to an injection mold for a ceiling lamp base. Background Art

[0002] A ceiling lamp is a type of lamp. As the name implies, it is called a ceiling lamp because the upper part of the lamp is relatively flat and the bottom is completely attached to the roof during installation. The light sources of ceiling lamps include ordinary incandescent bulbs, fluorescent lamps, high-intensity discharge lamps, tungsten halogen lamps, LED lamps, etc. The ceiling lamp is fixedly connected to the top surface of the room through a base, and the existing ceiling lamp bases are generally injection molded.

[0003] Currently, an injection mold for a ceiling lamp base generally includes an upper mold base, an upper template, a lower mold base, a lower template, etc. After the injection molding of the ceiling lamp base is completed, ejector pins are used to demold the lamp base injection molded in the mold. Due to the irregular structure of the ceiling lamp base, the traditional ejection method causes uneven stress on each position of the ceiling lamp base, making it difficult to demold the ceiling lamp base, and the ceiling lamp base is prone to deformation during demolding, and there is a risk of damage to the ceiling lamp base. Summary of the Utility Model

[0004] The purpose of the present utility model is to address the above problems existing in the prior art and propose an injection mold for a ceiling lamp base. The technical problem to be solved by the present utility model is: how to ensure the smooth demolding of the ceiling lamp base without damage.

[0005] The purpose of the present utility model can be achieved by the following technical solutions:

[0006] An injection mold for a ceiling lamp base, comprising an upper mold and a lower mold. The lower mold includes a lower template, a push plate located below the lower template, and ejector pins arranged on the push plate. A core is provided in the middle of the lower template. It is characterized in that the core includes a circular forming surface arranged horizontally, a forming protrusion is provided in the middle of the circular forming surface, an annular forming surface is provided on the periphery of the circular forming surface, the annular forming surface is conical, the ejector pins include a first ejector pin group, a second ejector pin group, and a third ejector pin group. The upper ends of the first ejector pin group are arranged on the annular forming surface in a penetrating manner, the upper ends of the second ejector pin group are arranged on the circular forming surface in a penetrating manner, and the upper ends of the third ejector pin group are arranged on the forming protrusion in a penetrating manner.

[0007] In the above injection mold for a ceiling lamp base, the first ejector pin group includes a plurality of ejector pins one. All the ejector pins one are arranged at intervals in a ring shape, and the upper ends of all the ejector pins one are abutted against the outer edge position of the annular forming surface.

[0008] In the above-mentioned injection mold for the base of a ceiling lamp, a first groove is radially formed on the annular forming surface. There are several such first grooves, and all the first grooves are arranged at intervals along the circumferential direction of the annular forming surface. The first ejector pin is arranged on the left side or / and the right side of each first groove.

[0009] In the above-mentioned injection mold for the base of a ceiling lamp, the second ejector pin group includes several second ejector pins. All the second ejector pins are arranged at intervals in a ring shape. There is an annular second groove between the circular forming surface and the annular forming surface, and the upper ends of all the second ejector pins are close to the second groove.

[0010] In the above-mentioned injection mold for the base of a ceiling lamp, the forming protrusion is rectangular. The second ejector pin group includes several third ejector pins. All the third ejector pins are distributed around the forming protrusion, and the upper ends of all the third ejector pins are close to the lower edge of the forming protrusion.

[0011] In the above-mentioned injection mold for the base of a ceiling lamp, the third ejector pin group includes several fourth ejector pins, and the upper ends of all the fourth ejector pins are inserted into the forming protrusion.

[0012] Compared with the prior art, the injection mold for the base of a ceiling lamp of the present invention has the following advantages: After the base of the ceiling lamp is injection-molded, the first ejector pin group ejects against the outer ring part, the second ejector pin group ejects against the bottom plate, and the third ejector pin group ejects against the mounting seat, so that these three parts of the base of the ceiling lamp are all stressed simultaneously, which facilitates the rapid and smooth ejection of the base of the ceiling lamp. At the same time, the base of the ceiling lamp will not be deformed, improving the yield rate of the base of the ceiling lamp after demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0014] Figure 2 is a three-dimensional structural schematic diagram of the base of the ceiling lamp of the present invention.

[0015] Figure 3 is a top view of the lower mold of the present invention.

[0016] Figure 4 is a three-dimensional structural schematic diagram of the lower mold of the present invention.

[0017] Figure 5 is a partial three-dimensional structural schematic diagram of the lower mold of the present invention.

[0018] In the figure, upper mold 1; lower mold 2; lower template 20; ejector plate 21; core 23; circular forming surface 230; forming protrusion 231; annular forming surface 232; groove one 233; groove two 234; first ejector pin group 3; ejector pin one 30; second ejector pin group 4; ejector pin two 40; ejector pin three 41; third ejector pin group 5; ejector pin four 50; ceiling lamp base 6; bottom plate 60; mounting seat 61; outer ring part 62. Detailed implementation manner

[0019] The following are specific embodiments of the present utility model and in combination with the attached drawings, the technical solutions of the present utility model are further described, but the present utility model is not limited to these embodiments.

[0020] As Figures 1 to 5 shown, this injection mold for the ceiling lamp base includes an upper mold 1 and a lower mold 2. The lower mold 2 includes a lower template 20, an ejector plate 21 located below the lower template 20, and ejector pins arranged on the ejector plate 21. The middle of the lower template 20 has a core 23. The core 23 includes a horizontally arranged circular forming surface 230. The middle of the circular forming surface 230 has a forming protrusion 231. The periphery of the circular forming surface 230 has an annular forming surface 232. The annular forming surface 232 is conical. The ejector pins include a first ejector pin group 3, a second ejector pin group 4, and a third ejector pin group 5. The upper ends of the first ejector pin group 3 are arranged through the annular forming surface 232. The upper ends of the second ejector pin group 4 are arranged through the circular forming surface 230. The upper ends of the third ejector pin group 5 are arranged through the forming protrusion 231. The ceiling lamp base 6 includes a bottom plate 60. The middle of the bottom plate 60 has an upward protruding mounting seat 61. The periphery of the bottom plate 60 has an annular outer ring part 62. The outer ring part 62 is conical. When the ceiling lamp base 6 is injection molded, the first ejector pin group 3 abuts against the outer ring part 62, the second ejector pin group 4 abuts against the bottom plate 60, and the third ejector pin group 5 abuts against the mounting seat 61, so that these three parts of the ceiling lamp base 6 are all stressed simultaneously, facilitating the rapid and smooth ejection of the ceiling lamp base 6. At the same time, the ceiling lamp base 6 will not be deformed, improving the yield rate of the ceiling lamp base 6 after demolding.

[0021] As Figure 3 、 Figure 4 and Figure 5 shown, the first ejector pin group 3 includes a plurality of ejector pins one 30. All the ejector pins one 30 are arranged at intervals in a ring shape. The upper ends of all the ejector pins one 30 are abutted against the outer edge position of the annular forming surface 232. Since the outer ring part 62 is annular, the arrangement of all the ejector pins one 30 at intervals in a ring shape makes the circumferential parts of the outer ring part 62 stressed evenly. At the same time, the upper ends of the ejector pins one 30 are abutted against the outer edge position of the outer ring part 62, facilitating the gradual separation of the outer ring part 62 from the annular forming surface 232 and improving the smoothness of the demolding of the outer ring part 62.

[0022] As Figure 3 、Figure 4 and Figure 5 As shown in Figure 5 , a first groove 233 is radially formed on the annular forming surface 232. There are several first grooves 233, and all the first grooves 233 are arranged at intervals along the circumferential direction of the annular forming surface 232. A first ejector pin 30 is arranged on the left side or / and the right side of each first groove 233. The design of the first groove 233 enables ribs to be formed on the outer ring portion 62. It is not easy to demold at the position of the ribs, while arranging the first ejector pin 30 near the first groove 233 facilitates the smooth demolding of the ribs, which is conducive to improving the convenience of the outer ring portion 62.

[0023] As Figure 3 , Figure 4 and Figure 5 As shown in Figure 3 , Figure 4 and Figure 5 , the second ejector pin group 4 includes several second ejector pins 40, and all the second ejector pins 40 are arranged at annular intervals. There is an annular second groove 234 between the circular forming surface 230 and the annular forming surface 232, and the upper ends of all the second ejector pins 40 are arranged near the second groove 234. The design of the second groove 234 enables ribs to be formed between the outer ring portion 62 and the bottom plate 60. Arranging the upper ends of all the second ejector pins 40 near the second groove 234 facilitates the demolding of the ribs at this position and is also conducive to the smooth demolding of the bottom plate 60.

[0024] As Figure 3 , Figure 4 and Figure 5 As shown in Figure 3 , Figure 4 and Figure 5 , the forming protrusion 231 is rectangular. The second ejector pin group 4 includes several third ejector pins 41, and all the third ejector pins 41 are distributed around the forming protrusion 231. The upper ends of all the third ejector pins 41 are arranged near the lower edge of the forming protrusion 231. The design of this structure facilitates the smooth demolding of the lower end of the mounting seat 61. The third ejector pin group 5 includes several fourth ejector pins 50, and the upper ends of all the fourth ejector pins 50 are inserted into the forming protrusion 231. The design of this structure facilitates the smooth demolding of the mounting seat 61.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. An injection mold for a ceiling lamp base, comprising an upper mold (1) and a lower mold (2). The lower mold (2) includes a lower template (20), a push plate (21) located below the lower template (20), and ejector pins provided on the push plate (21). The middle part of the lower template (20) has a core (23), and it is characterized in that, The core (23) includes a circular forming surface (230) arranged horizontally. The middle of the circular forming surface (230) has a forming protrusion (231). The periphery of the circular forming surface (230) has an annular forming surface (232). The annular forming surface (232) is conical. The ejector pin includes a first ejector pin group (3), a second ejector pin group (4), and a third ejector pin group (5). The upper end of the first ejector pin group (3) is arranged through the annular forming surface (232). The upper end of the second ejector pin group (4) is arranged through the circular forming surface (230). The upper end of the third ejector pin group (5) is arranged through the forming protrusion (231).

2. The injection mold for the ceiling lamp base according to claim 1, characterized in that, The first ejector pin group (3) includes a plurality of first ejector pins (30). All the first ejector pins (30) are arranged at intervals in a ring shape. The upper ends of all the first ejector pins (30) are abutted against the outer edge position of the annular forming surface (232).

3. The injection mold for the ceiling lamp base according to claim 2, characterized in that, A first groove (233) is radially formed on the annular forming surface (232). There are a plurality of the first grooves (233). All the first grooves (233) are arranged at intervals along the circumferential direction of the annular forming surface (232). The first ejector pin (30) is arranged on the left side and / or the right side of each first groove (233).

4. The injection mold for the ceiling lamp base according to claim 1, wherein The second ejector pin group (4) includes a plurality of second ejector pins (40). All the second ejector pins (40) are arranged at intervals in a ring shape. An annular second groove (234) is formed between the circular forming surface (230) and the annular forming surface (232). The upper ends of all the second ejector pins (40) are arranged close to the second groove (234).

5. The injection mold for the ceiling lamp base according to claim 4, wherein, The forming protrusion (231) is rectangular. The second ejector pin group (4) includes a plurality of third ejector pins (41). All the third ejector pins (41) are distributed around the forming protrusion (231). The upper ends of all the third ejector pins (41) are arranged close to the lower edge of the forming protrusion (231).

6. The injection mold for the ceiling lamp base according to claim 1, wherein, The third ejector pin group (5) includes a plurality of fourth ejector pins (50). The upper ends of all the fourth ejector pins (50) are arranged through the forming protrusion (231).

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