Bijection forming mold for flashlight lampshade

Abstract

The utility model discloses a bijection forming mould for a flash lamp shade, which comprises a flash lamp shade provided with a reflecting part and a diffusing part, and is characterized by further comprising a first upper mould, a second upper mould, a second upper mould, a second upper mould, a third upper mould, a fourth upper mould, a fifth upper mould, a sixth upper mould and a seventh upper mould, a second cavity matched with the outline of the diffusion part and a second feeding pipe used for feeding are arranged in the second upper mold; a lower mold plate of the lower mold is provided with a lower mold cavity matched with the first mold cavity and the second mold cavity, and a main runner corresponding to the first feeding pipe and the second feeding pipe; and the positions of the first feeding pipe and the second feeding pipe correspond to the position of an inlet of the main runner. The first upper die and the second upper die adopt the same main runner inlet to inject a liquid material into the lower die, so that the layout of runners and sprues is simplified, the die structure is optimized, and the research and development and production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of molds, and in particular relates to a double-shot molding mold for a flash lamp shade. Background Art

[0002] A double-shot mold is a special mold used in the double-shot molding process, which can inject two different materials into the same mold simultaneously or separately to produce products with complex structures and appearances.

[0003] Existing flashlight lampshades usually use two different gates to cast different materials to form the flashlight lampshade. Although traditional injection molding can form the flashlight lampshade, because the mold has two feed pipes, the design needs to consider the layout of the runners and gates and the processing cost of the mold, which is time-consuming and costly. Therefore, designing a simple molding mold is particularly important. Utility Model Content

[0004] In order to solve the above technical problems, the utility model discloses a double-shot molding mold for a flash lamp shade, which adopts two upper molds to alternately dock with the lower mold to make the flash lamp shade injection molding. The two upper molds use the same main flow channel inlet to inject liquid material into the lower mold, simplifying the runner and gate layout while optimizing the mold structure.

[0005] Specifically, the utility model discloses a double-shot molding mold for a flashlight lampshade, comprising a flashlight lampshade having a reflective portion and a diffuser portion, and is characterized in that it further comprises:

[0006] a first upper mold, wherein the first upper mold has a first cavity matching the contour of the reflecting portion, and a first feeding tube for feeding material;

[0007] a second upper mold having a second cavity therein matching the contour of the diffuser, and a second feed pipe for feeding material;

[0008] A lower mold, wherein the lower mold plate has a lower mold cavity matching the first mold cavity and the second mold cavity, and a main flow channel corresponding to the first feed pipe and the second feed pipe; wherein,

[0009] The positions of the first feeding pipe and the second feeding pipe correspond to the position of the inlet of the main channel.

[0010] Furthermore, the main flow channel is connected to the lower mold cavity through a branch flow channel.

[0011] Furthermore, the positions of the first feeding pipe and the second feeding pipe match, and the diameter of the second feeding pipe is larger than the diameter of the first feeding pipe.

[0012] Furthermore, the upper surface of the second upper mold is provided with an upper mold flow channel that matches the main flow channel and the branch flow channel.

[0013] Furthermore, one side of the second cavity is provided with an inlet connected to the upper mold runner.

[0014] Furthermore, the upper surface of the lower mold plate has a plurality of positioning protrusions, and the lower surfaces of the first upper mold and the second upper mold have positioning grooves matching the positioning protrusions.

[0015] Furthermore, the lower mold also includes an ejection mechanism for separating the flash lamp cover from the lower mold cavity. The ejection mechanism includes a top plate and a plurality of ejector rods. The ejector rods are connected to the top plate, and the top plate is slidably connected to the lower mold plate through a guide sleeve.

[0016] Furthermore, the push rod is arranged below the diffuser.

[0017] The beneficial effects of the present invention are:

[0018] The first and second upper molds use the same main flow channel inlet to inject liquid material into the lower mold, which simplifies the runner and gate layout while optimizing the mold structure and reducing R&D and production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0020] Figure 1 This is a schematic diagram of a double-shot molding die for a flashlight lampshade;

[0021] Figure 2 is a cross-sectional view of the main channel position of the first upper die and the lower die;

[0022] Figure 3 It is a cross-sectional view of the main channel position of the second upper die and the lower die;

[0023] Figure 4 is a cross-sectional view of the gate positions of the first upper mold and the lower mold;

[0024] Figure 5 It is a partial enlarged view of the cross-sectional view of the gate position of the first upper mold and the lower mold;

[0025] Figure 6 It is a cross-sectional view of the gate positions of the second upper mold and the lower mold;

[0026] Figure 7 It is a partial enlarged view of the cross-sectional view of the gate position of the second upper mold and the lower mold;

[0027] Figure 8 Schematic diagram of the first upper die;

[0028] Figure 9 Schematic diagram of the second upper die;

[0029] Figure 10 It is a schematic diagram of the lower die;

[0030] Figure 11 It is a schematic diagram of the state of the lower mold after the liquid material is poured through the first upper mold;

[0031] Figure 12 This is a schematic diagram of the state of the lower mold after the liquid material is poured through the second upper mold;

[0032] Figure 13 This is a schematic diagram of the flash lampshade;

[0033] Figure 14 It is a schematic diagram of the ejection mechanism;

[0034] Figure 15 This is a partial enlarged view of the ejection mechanism.

[0035] The numbers involved in the accompanying drawings are as follows: flash lamp cover 1, reflecting part 11, diffusing part 12, first upper mold 2, first cavity 21, first feed pipe 22, second upper mold 3, second cavity 31, second feed pipe 32, upper mold runner 33, feed port 34, positioning groove 35, lower mold 4, lower template 41, lower mold cavity 42, main channel 43, inlet 431, branch channel 44, positioning protrusion 45, ejection mechanism 46, top plate 461, ejector rod 462, guide sleeve 463. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings.

[0037] like Figure 1-15 As shown, the utility model discloses a double-shot molding mold for a flash lamp shade, comprising a flash lamp shade 1, the flash lamp shade 1 having a reflective portion 11 and a diffuser portion 12, and characterized in that it also includes:

[0038] A first upper mold 2 having a first mold cavity 21 matching the contour of the reflecting portion 11 and a first feeding pipe 22 for feeding material;

[0039] A second upper mold 3 having a second cavity 31 matching the contour of the diffuser 12 and a second feeding pipe 32 for feeding material;

[0040] The lower mold 4 has a lower mold cavity 42 matching the first mold cavity 21 and the second mold cavity 31, and a main flow channel 43 corresponding to the first feed pipe 22 and the second feed pipe 32; wherein,

[0041] The positions of the first feeding pipe 22 and the second feeding pipe 32 correspond to the position of the inlet 431 of the main channel 43 .

[0042] The utility model adopts a first upper mold 2 and a second upper mold 3 to be alternately connected with the lower mold 4 to make the flash lamp shade 1 injection molded. The two upper molds use the same main flow channel 43 inlet 431 to inject liquid material into the lower mold 4, simplifying the flow channel and gate layout while optimizing the mold structure.

[0043] The main channel 43 is connected to the lower mold cavity 42 through the branch channel 44 , and the liquid material in the main channel 43 enters the lower mold cavity 42 through the branch channel 44 to form the reflective portion 11 .

[0044] In some embodiments of the present invention, the positions of the first feed tube 22 and the second feed tube 32 match, and the diameter of the second feed tube 32 is larger than the diameter of the first feed tube 22. In this embodiment, the structures of the first upper mold 2 and the second upper mold 3 are basically the same, and the only difference lies in the structure of the first cavity 21 and the second cavity 31. The position of the first feed tube 22 in the first upper mold 2 is the same as the position of the second feed tube 32 in the second upper mold 3, which is convenient for docking with the lower mold and later maintenance of the molding mold. The diameter of the second feed tube 32 is larger than the diameter of the first feed tube 22, which facilitates the entry of liquid material into the second feed tube 32.

[0045] In some embodiments of the present invention, the upper surface of the second upper mold 3 is provided with an upper mold runner 33 that matches the main runner 43 and the branch runner 44. Furthermore, a feed port 34 is provided on one side of the second cavity 31, communicating with the upper mold runner 33. Liquid material enters the second cavity 31 through the main runner 43, the upper mold runner 33, and the feed port 34, forming the diffuser 12.

[0046] In order to improve the docking accuracy between the first upper mold 2 , the second upper mold 3 and the lower mold 4 , the upper surface of the lower mold plate 41 has several positioning protrusions 45 , and the lower surfaces of the first upper mold 2 and the second upper mold 3 have positioning grooves 35 matching the positioning protrusions 45 .

[0047] In some embodiments of the present invention, in order to facilitate the separation of the flash lampshade 1 from the lower mold cavity 42, the lower mold 4 also includes an ejection mechanism 46, which includes a top plate 461 and several ejector rods 462. The ejector rods 462 are connected to the top plate 461, and the top plate 461 is slidably connected to the lower mold plate 41 through a guide sleeve 463. The top plate 461 moves upward along the guide sleeve 463, and at the same time drives the ejector rods 462 to move upward, abutting against the flash lampshade 1, so that the flash lampshade 1 is separated from the lower mold cavity 42.

[0048] Since the reflective portion 11 has a high optical performance requirement, in order to prevent the top rod 462 from damaging the reflective portion 11 , the top rod 462 is disposed below the diffuser 12 .

[0049] The working mode of the utility model is as follows:

[0050] The first upper mold 2 is docked with the lower mold 4, and a liquid material enters the first cavity 21 through the first feed pipe 22, the main channel 43, and the branch channel 44 to be formed into the reflective part 11; then the first upper mold 2 rises, and the mold rotates to dock the second upper mold 3 with the lower mold 4, and another liquid material enters the second cavity 31 through the second material pipe, the upper mold flow channel 33 and the feed port 34 to be formed into the diffuser 12; then the second upper mold 3 rises to complete the molding of the flash lamp shade 1.

[0051] For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A double-shot molding die for a flashlight lampshade, comprising a flashlight lampshade (1), wherein the flashlight lampshade (1) has a reflecting portion (11) and a diffusing portion (12), and is characterized in that: Also includes: A first upper mold (2), wherein the first upper mold (2) has a first mold cavity (21) matching the contour of the reflecting portion (11), and a first feeding pipe (22) for feeding material; A second upper mold (3), wherein the second upper mold (3) has a second cavity (31) matching the contour of the diffuser (12), and a second feed pipe (32) for feeding material; A lower mold (4), wherein the lower mold plate (41) of the lower mold (4) has a lower mold cavity (42) matching the first mold cavity (21) and the second mold cavity (31), and a main flow channel (43) corresponding to the first feed pipe (22) and the second feed pipe (32); wherein, The positions of the first feeding pipe (22) and the second feeding pipe (32) correspond to the position of the inlet (431) of the main channel (43).

2. The double-shot molding die for a flash lamp shade according to claim 1, wherein: The main flow channel (43) is connected to the lower mold cavity (42) through a branch flow channel (44).

3. The double-shot molding die for a flash lamp shade according to claim 2, wherein: The positions of the first feeding pipe (22) and the second feeding pipe (32) match, and the diameter of the second feeding pipe (32) is larger than the diameter of the first feeding pipe (22).

4. The double-shot molding die for a flash lamp shade according to claim 3, wherein: The upper surface of the second upper mold (3) is provided with an upper mold flow channel (33) that matches the main flow channel (43) and the branch flow channel (44).

5. The double-shot molding die for a flash lamp shade according to claim 4, characterized in that: One side of the second cavity (31) is also provided with an inlet (34) communicating with the upper mold flow channel (33).

6. The double-shot molding die for a flash lamp shade according to claim 1, wherein: The upper surface of the lower mold plate (41) has a plurality of positioning protrusions (45), and the lower surfaces of the first upper mold (2) and the second upper mold (3) have positioning grooves (35) matching the positioning protrusions (45).

7. The double-shot molding die for a flash lamp shade according to claim 1, wherein: The lower mold (4) also includes an ejection mechanism (46) for separating the flash lamp shade (1) from the lower mold cavity (42). The ejection mechanism (46) includes a top plate (461) and a plurality of ejector rods (462). The ejector rods (462) are connected to the top plate (461). The top plate (461) is slidably connected to the lower mold plate (41) via a guide sleeve (463).

8. The double-shot molding die for a flash lamp shade according to claim 7, wherein: The push rod (462) is arranged below the diffusion portion (12).

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