Secondary ejection demolding structure

Abstract

The utility model provides a secondary ejection demolding structure which comprises a mold assembly, an ejection assembly and a cooling assembly are arranged in the mold assembly, and the ejection assembly comprises a first ejection plate, a first guide rod, a first spring, a first ejection rod, a second ejection plate, a second guide rod, a second spring and a second ejection rod; the inner side wall of the first top plate is symmetrically and slidably connected with first guide rods, and the outer side walls of the first guide rods are sleeved with first springs. The first ejector rod is driven by the first ejector plate to move to complete mold opening action, the second ejector plate is pushed by the first ejector plate to move, a product is ejected by the second ejector rod, uniform stress of the product is ensured during ejection, the product percent of pass is improved, cooling water is fed through the water inlet pipe to cool the insert pin, and the cooling speed of materials near the insert pin is increased. And meanwhile, the cooling water after heat exchange is cooled by utilizing the radiating fins, so that the continuous cooling effect of the cooling water is improved, and the problem that products near the insert pin have defects is further avoided.

Description

Technical Field

[0001] The utility model relates to a demoulding structure, in particular to a secondary ejection demoulding structure, and belongs to the technical field of injection molds. Background Art

[0002] Injection molds play a key role in the injection molding process. Injection molding is a molding method that combines injection and molding. The molten plastic material is injected into the mold cavity of the mold under high pressure, and the molded product is obtained after cooling and solidification. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product dimensions. The product is easy to update and can be made into complex-shaped parts. This method is suitable for mass production of parts with complex shapes and is one of the important processing methods in modern manufacturing.

[0003] After the injection molded product is formed, it needs to be demolded through an ejection structure. The existing ejection demolding structure easily causes uneven force on the product, and product defects are prone to occur in areas with greater force. At the same time, for injection molds equipped with pins, the material near the pins cools down slowly during ejection, which is prone to deformation or breakage. Therefore, a secondary ejection demolding structure is proposed. Utility Model Content

[0004] In view of this, the utility model provides a secondary ejection demoulding structure to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0005] The technical solution of the embodiment of the utility model is implemented as follows: a secondary ejection demoulding structure includes a mold assembly, wherein an ejection assembly and a cooling assembly are arranged inside the mold assembly, and the ejection assembly includes a first ejector plate, a first guide rod, a first spring, a first ejector rod, a second ejector plate, a second guide rod, a second spring, and a second ejector rod;

[0006] The inner side wall of the first top plate is symmetrically slidably connected to a first guide rod, the outer side wall of the first guide rod is sleeved with a first spring, the upper surface of the first top plate is symmetrically fixedly connected to four first top rods, a second top plate is arranged above the first top plate, the inner side wall of the second top plate is symmetrically slidably connected to a second guide rod, the outer side wall of the second guide rod is sleeved with a second spring, and the upper surface of the second top plate is symmetrically fixedly connected to four second top rods;

[0007] The cooling assembly includes a water inlet pipe, a pin, a baffle, a heat exchange tube, a heat dissipation fin and a water outlet pipe;

[0008] One end of the water inlet pipe is connected to a pin, the inner wall of the pin is fixedly connected to a partition, two pins are provided, a heat exchange tube is passed between the two pins, the outer wall of the heat exchange tube is evenly fixedly connected to cooling fins, and the pin is connected to the water outlet pipe.

[0009] Further preferably: the mold assembly includes a lower mold base and a lower mold plate;

[0010] The top of the lower die base is fixedly connected with the lower die plate, the first guide rod and the second guide rod are fixedly connected to the bottom of the lower die plate, and the bottom end of the second guide rod is fixedly connected to the limiting block.

[0011] Further preferably, guide sleeves are symmetrically arranged on the upper surface of the lower template.

[0012] Further preferably, a cavity is provided on the upper surface of the lower template, and the insert pin is fixedly connected to the inner wall of the cavity.

[0013] Further preferably, an upper mold plate is arranged above the lower mold base.

[0014] Further preferably, the top of the upper mold plate is fixedly connected with an upper mold base.

[0015] Further preferably, an injection port is provided on the top of the upper mold base.

[0016] Further preferably, guide pillars are symmetrically fixedly connected to the bottom of the upper template.

[0017] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0018] 1. The utility model completes the mold opening action by driving the first ejector rod to move through the first ejector plate, and pushes the second ejector plate to move through the first ejector plate, and uses the second ejector rod to eject the product, ensuring that the product is evenly stressed during ejection, thereby improving the product qualification rate.

[0019] 2. The utility model delivers cooling water through a water inlet pipe to cool the inlay pin, thereby accelerating the cooling speed of the material near the inlay pin, and at the same time utilizes heat dissipation fins to cool the cooling water after heat exchange, thereby improving the continuous cooling effect of the cooling water, thereby avoiding the problem of defects in products near the inlay pin.

[0020] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 This is a split structure diagram of the utility model;

[0024] Figure 3 This is a structural diagram of the ejection assembly of the utility model;

[0025] Figure 4 This is a bottom view of the structure of the lower template of the utility model;

[0026] Figure 5 This is a diagram showing the internal structure of the needle insert of the present utility model.

[0027] 1. The mold assembly includes: 10, mold assembly; 11, lower mold base; 12, lower mold plate; 13, guide sleeve; 14, cavity; 15, upper mold base; 16, injection port; 17, upper mold plate; 18, guide pillar; 20, ejector assembly; 21, first ejector plate; 22, first guide rod; 23, first spring; 24, first ejector rod; 25, second ejector plate; 26, second guide rod; 27, second spring; 28, second ejector rod; 30, cooling assembly; 31, water inlet pipe; 32, needle; 33, partition; 34, heat exchange tube; 35, heat sink fin; 36, water outlet pipe. DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0029] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0030] like Figure 1-5 As shown, the embodiment of the utility model provides a secondary ejection demoulding structure, including a mold assembly 10, wherein an ejection assembly 20 and a cooling assembly 30 are arranged inside the mold assembly 10, and the ejection assembly 20 includes a first ejector plate 21, a first guide rod 22, a first spring 23, a first ejector rod 24, a second ejector plate 25, a second guide rod 26, a second spring 27 and a second ejector rod 28;

[0031] The inner side wall of the first top plate 21 is symmetrically slidably connected with a first guide rod 22, the outer side wall of the first guide rod 22 is sleeved with a first spring 23, the upper surface of the first top plate 21 is symmetrically fixedly connected with four first top rods 24, a second top plate 25 is arranged above the first top plate 21, the inner side wall of the second top plate 25 is symmetrically slidably connected with a second guide rod 26, the outer side wall of the second guide rod 26 is sleeved with a second spring 27, the upper surface of the second top plate 25 is symmetrically fixedly connected with four second top rods 28, the spring is used to drive the top plate to complete the reset, so as to facilitate the continuous mold opening and closing action;

[0032] The cooling assembly 30 includes a water inlet pipe 31, a pin 32, a baffle 33, a heat exchange tube 34, a heat dissipation fin 35 and a water outlet pipe 36;

[0033] One end of the water inlet pipe 31 is connected to a pin 32, and the inner wall of the pin 32 is fixedly connected to a partition 33. Two pins 32 are provided, and a heat exchange tube 34 is passed between the two pins 32. The outer wall of the heat exchange tube 34 is evenly and fixedly connected with heat dissipation fins 35. The pin 32 is connected to the water outlet pipe 36, and cooling water is sent into one of the pins 32 through the water inlet pipe 31. After the cooling water passes through the channel formed by the partition 33, it exchanges heat with the material to increase the cooling speed of the material. The heated cooling water enters the heat exchange tube 34, dissipates heat through the heat dissipation fins 35, and enters the pin 32 again for heat exchange after the temperature drops. The cooling water after heat exchange is cooled by the heat dissipation fins 35 to improve the continuous cooling effect of the cooling water.

[0034] In this embodiment, specifically: the mold assembly 10 includes a lower mold base 11 and a lower mold plate 12;

[0035] The top of the lower mold base 11 is fixedly connected to the lower mold plate 12, the first guide rod 22 and the second guide rod 26 are fixedly connected to the bottom of the lower mold plate 12, and the bottom end of the second guide rod 26 is fixedly connected to a limiting block, which is used to limit the position of the second top plate 25.

[0036] In this embodiment, specifically: the upper surface of the lower template 12 is symmetrically provided with guide sleeves 13 .

[0037] In this embodiment, specifically: a cavity 14 is provided on the upper surface of the lower template 12 , and an inserting pin 32 is fixedly connected to the inner wall of the cavity 14 , and the inserting pin 32 is used to form a hole on the product.

[0038] In this embodiment, specifically: an upper mold plate 17 is disposed above the lower mold base 11 , and a mold core is disposed at the bottom of the upper mold plate 17 .

[0039] In this embodiment, specifically: the top of the upper mold plate 17 is fixedly connected to the upper mold base 15 .

[0040] In this embodiment, specifically: an injection port 16 is provided on the top of the upper mold base 15 , and the material is fed into the mold cavity 14 through the injection port 16 .

[0041] In this embodiment, specifically: the bottom of the upper mold plate 17 is symmetrically fixedly connected with a guide column 18, and the guide column 18 and the guide sleeve 13 cooperate to ensure the accuracy of mold closing.

[0042] When the utility model is working: after the mold is closed, the material is sent into the cavity 14 through the injection port 16 and is cooled and formed in the cavity 14. During the cooling process, cooling water is sent into one of the inlay pins 32 through the water inlet pipe 31. After the cooling water passes through the channel formed by the partition 33, it exchanges heat with the material to increase the cooling speed of the material. The heated cooling water enters the heat exchange tube 34 and dissipates heat through the heat dissipation fins 35. After the temperature is lowered, it enters another inlay pin 32 for heat exchange. The cooling water after heat exchange is cooled by the heat dissipation fins 35 to improve the continuous cooling effect of the cooling water, thereby avoiding the problem of defects in the product near the inlay pin 32. After the material is formed, the first top plate 21 is driven by the driving mechanism to drive the first push rod 24 to move, and the mold opening action is completed. The second top plate 25 is pushed to move by the first top plate 21, and the product is ejected by the second push rod 28. During ejection, the product is ensured to be evenly stressed, thereby improving the product qualification rate.

[0043] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A secondary ejection demoulding structure, comprising a mold assembly (10), characterized in that: An ejector assembly (20) and a cooling assembly (30) are arranged inside the mold assembly (10), and the ejector assembly (20) comprises a first ejector plate (21), a first guide rod (22), a first spring (23), a first ejector rod (24), a second ejector plate (25), a second guide rod (26), a second spring (27) and a second ejector rod (28); The inner side wall of the first top plate (21) is symmetrically slidably connected to a first guide rod (22), the outer side wall of the first guide rod (22) is sleeved with a first spring (23), the upper surface of the first top plate (21) is symmetrically fixedly connected to four first top rods (24), a second top plate (25) is arranged above the first top plate (21), the inner side wall of the second top plate (25) is symmetrically slidably connected to a second guide rod (26), the outer side wall of the second guide rod (26) is sleeved with a second spring (27), and the upper surface of the second top plate (25) is symmetrically fixedly connected to four second top rods (28); The cooling assembly (30) comprises a water inlet pipe (31), a pin (32), a partition (33), a heat exchange tube (34), a heat dissipation fin (35) and a water outlet pipe (36); One end of the water inlet pipe (31) is connected to a needle (32), the inner wall of the needle (32) is fixedly connected to a partition (33), two needles (32) are provided, a heat exchange tube (34) is passed between the two needles (32), the outer wall of the heat exchange tube (34) is evenly fixedly connected to a heat dissipation fin (35), and the needle (32) is connected to a water outlet pipe (36).

2. The secondary ejection demoulding structure according to claim 1, characterized in that: The mold assembly (10) comprises a lower mold base (11) and a lower mold plate (12); The top of the lower die base (11) is fixedly connected to the lower die plate (12), the first guide rod (22) and the second guide rod (26) are fixedly connected to the bottom of the lower die plate (12), and the bottom end of the second guide rod (26) is fixedly connected to a limiting block.

3. A secondary ejection demoulding structure according to claim 2, characterized in that: The upper surface of the lower template (12) is symmetrically provided with guide sleeves (13).

4. The secondary ejection demoulding structure according to claim 3, characterized in that: A cavity (14) is provided on the upper surface of the lower template (12), and the insert pin (32) is fixedly connected to the inner wall of the cavity (14).

5. The secondary ejection demoulding structure according to claim 2, characterized in that: An upper mold plate (17) is arranged above the lower mold base (11).

6. The secondary ejection demoulding structure according to claim 5, characterized in that: The top of the upper mold plate (17) is fixedly connected to an upper mold base (15).

7. The secondary ejection demoulding structure according to claim 6, characterized in that: The top of the upper mold base (15) is provided with an injection port (16).

8. The secondary ejection demoulding structure according to claim 6, characterized in that: The bottom of the upper template (17) is symmetrically fixedly connected with a guide column (18).

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