64-cavity injection mold and injection molding process thereof

Abstract

The 64-hole injection mold comprises a lower mold assembly, an upper mold assembly is arranged on the top of the lower mold assembly, and a cooling assembly is arranged in the lower mold assembly; the upper die assembly comprises an upper die base, an upper die plate, a controller, guide columns, cutters and through holes, the upper die plate is fixedly connected to the bottom of the upper die base, the controller is installed on the front surface of the upper die plate, the four guide columns are symmetrically and fixedly connected to the bottom of the upper die plate, the cutters are evenly and fixedly connected to the bottom of the upper die plate, and the through holes are formed in the upper die base. And a through hole is formed in one side of the cutter. According to the invention, the cutter is arranged at the bottom of the upper template, and the cutter is positioned in the sub-runner during mold closing, so that a product can be automatically separated from redundant materials during mold opening of the mold, secondary treatment is not needed, and the production process is simplified. And materials in the cavity are cooled through the cooling assembly, the product forming speed is increased, and the product production efficiency is improved.

Description

Technical Field

[0001] The invention relates to an injection mold, in particular to a 64-cavity injection mold and an injection molding process thereof, belonging 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] The 64-cavity injection mold is an injection mold designed for mass production of small plastic parts (such as rivets, keycaps, screws, etc.). Its characteristic is that there are 64 cavities in the mold, which can simultaneously inject and mold multiple products, significantly improving production efficiency. When the 64-cavity injection mold is in production, due to the small size of the product, it is not easy to separate the material and the product at the gate. There is a lot of excess material when the product is ejected, and secondary processing is required. At the same time, the cooling speed of the injection molded product is slow, which affects the production efficiency. Therefore, a 64-cavity injection mold and its injection molding process are proposed. Summary of the invention

[0004] In view of this, the present invention provides a 64-cavity injection mold and an injection molding process thereof to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0005] The technical solution of the embodiment of the present invention is implemented as follows: a 64-cavity injection mold, comprising a lower mold assembly, an upper mold assembly is arranged on the top of the lower mold assembly, and a cooling assembly is arranged inside the lower mold assembly;

[0006] The upper mold assembly includes an upper mold base, an upper mold plate, a controller, a guide column, a cutter and a through hole. The upper mold plate is fixedly connected to the bottom of the upper mold base, and the controller is installed on the front surface of the upper mold plate. Four guide columns are symmetrically fixedly connected to the bottom of the upper mold plate. The bottom of the upper mold plate is evenly fixedly connected to the cutter. A through hole is opened on one side of the cutter. After the mold is closed, the material enters the hot runner through the gate, then enters the branch channel through the hot runner, and finally enters each cavity respectively. When the material is injected, the heater is used to maintain the temperature of the material during the injection process. After the material injection work is completed, the material is cooled and formed inside the cavity;

[0007] The cooling assembly includes a water inlet pipe, a water distribution plate, a heat exchange tube, a manifold and a water outlet pipe. One end of the water inlet pipe is connected to the water distribution plate, one side of the water distribution plate is evenly connected to the heat exchange tube, one end of the heat exchange tube is connected to the manifold, and one side of the manifold is connected to the water outlet pipe.

[0008] Further preferably: the upper mold assembly further includes a gate, a hot runner and a heater;

[0009] A gate is arranged on the top of the upper mold base, a hot runner is connected to the bottom of the gate, and a heater is installed inside the upper mold plate.

[0010] Further preferably: the lower mold assembly includes a lower mold base and a lower mold plate;

[0011] The top of the lower mold base is fixedly connected with a lower mold plate, and the heat exchange tube is fixedly connected to the inside of the lower mold plate.

[0012] Further preferably, guide sleeves are symmetrically provided on the top of the lower template, and the guide sleeves are arranged opposite to the guide pillars.

[0013] Further preferably, the upper surface of the lower template is evenly fixedly connected with a mold core, and the interior of the mold core is evenly provided with a mold cavity.

[0014] Further preferably, a branch channel is provided on the top of the mold core, a feed hole is provided at one end of the branch channel, and the branch channel is connected to the mold cavity.

[0015] Further preferably, the upper surface of the lower die base is symmetrically fixedly connected with a guide rod, and the outer side wall of the guide rod is sleeved with a spring.

[0016] Further preferably, the outer side wall of the guide rod is slidably connected with a top plate, the top plate is arranged at the bottom end of the spring, the top of the top plate is evenly fixedly connected with an ejector pin, and the ejector pin is slidably connected to the inner side wall of the lower template.

[0017] In addition, the present invention also provides a 64-cavity injection molding process, comprising the following steps:

[0018] Step 1: When closing the mold, the guide sleeve and the guide pillar cooperate to complete the positioning between the lower mold assembly and the upper mold assembly. After the positioning is completed, the upper mold assembly moves downward to complete the mold closing;

[0019] Step 2: The material enters the hot runner through the gate, then enters the branch runner through the hot runner, and finally enters each cavity to complete the material injection work. The material is cooled and formed inside the cavity;

[0020] Step 3: Cooling water is fed into the water inlet pipe. The cooling water is discharged after passing through the water distribution plate, heat exchange tube, manifold and water outlet pipe in sequence, and exchanges heat with the material in the heat exchange tube;

[0021] Step 4: After the product is cooled and formed, the upper mold assembly moves upward to open the mold. During the mold opening process, a cutter is used to cut off excess material. After the mold opening is completed, the ejector plate and ejector pin move upward to eject the product.

[0022] Further preferably, in step 2, when injecting the material, a heater is used to maintain the temperature of the material during the injection process.

[0023] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0024] 1. The present invention arranges a cutter at the bottom of the upper mold plate, and locates the cutter inside the runner when the mold is closed, so that the mold can automatically separate the product from the excess material when the mold is opened, without the need for secondary processing, thereby simplifying the production process.

[0025] 2. The present invention reduces the temperature of the material inside the cavity through a cooling component, thereby accelerating the product molding speed and improving the production efficiency of the product.

[0026] The above summary is for illustrative purposes 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 present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 It is a structural diagram of the present invention;

[0029] Figure 2 It is the structural diagram of the upper template of the present invention;

[0030] Figure 3 This is an enlarged structural diagram of location A of the present invention;

[0031] Figure 4 It is the internal structure diagram of the upper template of the present invention;

[0032] Figure 5 It is a structural diagram of the lower template of the present invention;

[0033] Figure 6 It is an enlarged structural diagram of location B of the present invention;

[0034] Figure 7It is a structural diagram of the cooling assembly of the present invention;

[0035] Figure 8 It is a top plate structure diagram of the present invention.

[0036] Figure numerals: 10, lower mold assembly; 11, lower mold base; 12, lower mold plate; 13, guide sleeve; 14, mold core; 15, cavity; 16, runner; 17, feed hole; 18, guide rod; 19, spring; 110, ejector plate; 111, ejector pin; 20, upper mold assembly; 21, upper mold base; 22, upper mold plate; 23, controller; 24, guide column; 25, cutter; 26, through hole; 27, gate; 28, hot runner; 29, heater; 30, cooling assembly; 31, water inlet pipe; 32, water distribution plate; 33, heat exchange tube; 34, manifold; 35, water outlet pipe. DETAILED DESCRIPTION

[0037] 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.

[0038] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein may be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein may be implemented independently of any other aspect, and two or more of these aspects may be combined in various ways. For example, any number of aspects described herein may be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein may be used to implement this device and / or practice this method.

[0040] like Figure 1-8 As shown, an embodiment of the present invention provides a 64-cavity injection mold, including a lower mold assembly 10, an upper mold assembly 20 is arranged on the top of the lower mold assembly 10, and a cooling assembly 30 is arranged inside the lower mold assembly 10;

[0041] The upper mold assembly 20 includes an upper mold base 21, an upper mold plate 22, a controller 23, a guide column 24, a cutter 25 and a through hole 26. The upper mold base 21 is fixedly connected to the bottom of the upper mold base 21, and the controller 23 is installed on the front surface of the upper mold plate 22. Four guide columns 24 are symmetrically fixedly connected to the bottom of the upper mold plate 22. The cutter 25 is evenly fixedly connected to the bottom of the upper mold plate 22. A through hole 26 is opened on one side of the cutter 25. The material enters the hot runner 28 through the gate 27, and then enters the branch runner 16 through the hot runner 28, and finally enters the inside of each cavity 15. After the mold is closed, the through hole 26 is aligned with the feed hole 17.

[0042] The cooling assembly 30 includes an inlet pipe 31, a water distribution plate 32, a heat exchange tube 33, a manifold 34 and an outlet pipe 35. One end of the inlet pipe 31 is connected to the water distribution plate 32, one side of the water distribution plate 32 is evenly connected to the heat exchange tube 33, one end of the heat exchange tube 33 is connected to the manifold 34, one side of the manifold 34 is connected to the outlet pipe 35. Cooling water is fed into the inlet pipe 31, and the cooling water is discharged after passing through the water distribution plate 32, the heat exchange tube 33, the manifold 34 and the outlet pipe 35 in sequence, and exchanges heat with the material in the heat exchange tube 33 to accelerate the cooling and molding speed of the product.

[0043] In this embodiment, specifically: the upper mold assembly 20 further includes a gate 27, a hot runner 28 and a heater 29;

[0044] A gate 27 is provided at the top of the upper mold base 21, and a hot runner 28 is connected to the bottom of the gate 27. A heater 29 is installed inside the upper mold plate 22. When injecting materials, the heater 29 is used to maintain the temperature of the materials during the injection process.

[0045] In this embodiment, specifically: the lower mold assembly 10 includes a lower mold base 11 and a lower mold plate 12;

[0046] The top of the lower die base 11 is fixedly connected with the lower die plate 12 , and the heat exchange tube 33 is fixedly connected to the inside of the lower die plate 12 . The cooling water exchanges heat with the material in the heat exchange tube 33 to cool the product.

[0047] In this embodiment, specifically: a guide sleeve 13 is symmetrically opened on the top of the lower mold plate 12, and the guide sleeve 13 and the guide column 24 are arranged opposite to each other. When the mold is closed, the guide sleeve 13 and the guide column 24 cooperate to complete the positioning between the lower mold assembly 10 and the upper mold assembly 20 to ensure the mold positioning accuracy.

[0048] In this embodiment, specifically: a mold core 14 is evenly and fixedly connected to the upper surface of the lower mold plate 12 , and a mold cavity 15 is evenly arranged inside the mold core 14 , and the material is cooled and formed inside the mold cavity 15 .

[0049] In this embodiment, specifically: a branch channel 16 is opened on the top of the mold core 14, a feed hole 17 is set at one end of the branch channel 16, the branch channel 16 is connected to the cavity 15, and the branch channel 16 plays a backflow role, so that the material enters each cavity 15 evenly.

[0050] In this embodiment, specifically: the upper surface of the lower mold base 11 is symmetrically fixedly connected with a guide rod 18, the outer wall of the guide rod 18 is sleeved with a spring 19, the guide rod 18 guides the movement trajectory of the top plate 110, and the spring 19 is used to reset the top plate 110.

[0051] In this embodiment, specifically: the outer wall of the guide rod 18 is slidably connected with a top plate 110, the top plate 110 is arranged at the bottom end of the spring 19, the top of the top plate 110 is evenly fixedly connected with an ejector pin 111, the ejector pin 111 is slidably connected to the inner wall of the lower mold plate 12, after the mold opening is completed, the top plate 110 and the ejector pin 111 move upward to eject the product.

[0052] In addition, the present invention also provides a 64-cavity injection molding process, comprising the following steps:

[0053] Step 1: When closing the mold, the guide sleeve 13 and the guide pillar 24 cooperate to complete the positioning between the lower mold assembly 10 and the upper mold assembly 20. After the positioning is completed, the upper mold assembly 20 moves downward to complete the mold closing;

[0054] Step 2: The material enters the hot runner 28 through the gate 27, then enters the branch runner 16 through the hot runner 28, and finally enters each cavity 15 to complete the material injection work. The material is cooled and formed inside the cavity 15;

[0055] Step 3: Cooling water is fed into the water inlet pipe 31. The cooling water is discharged after passing through the water distribution plate 32, the heat exchange tube 33, the manifold 34 and the water outlet pipe 35 in sequence, and exchanges heat with the material in the heat exchange tube 33;

[0056] Step 4: After the product is cooled and formed, the upper mold assembly 20 moves upward to open the mold. During the mold opening process, the cutter 25 is used to cut off excess material. After the mold opening is completed, the ejector plate 110 and the ejector pin 111 move upward to eject the product.

[0057] In this embodiment, specifically: in step 2, when injecting the material, the heater 29 is used to maintain the temperature of the material during the injection process.

[0058] The present invention is in operation: when the mold is closed, the guide sleeve 13 and the guide column 24 cooperate to complete the positioning between the lower mold assembly 10 and the upper mold assembly 20. After the positioning is completed, the upper mold assembly 20 moves downward to complete the mold closing. The material enters the hot runner 28 through the gate 27, then enters the branch runner 16 through the hot runner 28, and finally enters the inside of each cavity 15. When the material is injected, the heater 29 is used to maintain the temperature of the material during the injection process. After the material injection work is completed, the material is cooled and formed inside the cavity 15, and cooling water is sent to the water inlet pipe 31. The cooling water passes through the water divider 3 in sequence. 2. The heat exchange tube 33, the manifold 34 and the water outlet pipe 35 are discharged, and heat is exchanged with the material in the heat exchange tube 33. After the product is cooled and formed, the upper mold assembly 20 moves upward to open the mold. During the mold opening process, the cutter 25 is used to cut off the excess material. After the mold opening is completed, the ejector plate 110 and the ejector pin 111 move upward to eject the product. By arranging the cutter 25 at the bottom of the upper mold plate 22 and locating the cutter 25 inside the diverter 16 when closing the mold, the mold can automatically separate the product from the excess material when opening the mold, without the need for secondary processing, thereby simplifying the production process.

[0059] The basic principles of the present disclosure are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present disclosure are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present disclosure. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, and are not limitations. The above details do not limit the present disclosure to the necessity of adopting the above specific details to be implemented.

[0060] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A 64-cavity injection mold, comprising a lower mold assembly (10), characterized in that: An upper mold assembly (20) is arranged on the top of the lower mold assembly (10), and a cooling assembly (30) is arranged inside the lower mold assembly (10); The upper mold assembly (20) comprises an upper mold base (21), an upper mold plate (22), a controller (23), a guide column (24), a cutter (25) and a through hole (26); the upper mold plate (22) is fixedly connected to the bottom of the upper mold base (21); the controller (23) is installed on the front surface of the upper mold plate (22); four guide columns (24) are symmetrically fixedly connected to the bottom of the upper mold plate (22); the cutter (25) is evenly fixedly connected to the bottom of the upper mold plate (22); and a through hole (26) is provided on one side of the cutter (25); The cooling assembly (30) comprises a water inlet pipe (31), a water distribution plate (32), a heat exchange tube (33), a manifold (34) and a water outlet pipe (35); one end of the water inlet pipe (31) is connected to the water distribution plate (32); one side of the water distribution plate (32) is evenly connected to the heat exchange tube (33); one end of the heat exchange tube (33) is connected to the manifold (34); and one side of the manifold (34) is connected to the water outlet pipe (35).

2. A 64-cavity injection mold according to claim 1, characterized in that: The upper mold assembly (20) also includes a gate (27), a hot runner (28) and a heater (29); A gate (27) is provided at the top of the upper mold base (21), a hot runner (28) is connected to the bottom of the gate (27), and a heater (29) is installed inside the upper mold plate (22).

3. A 64-cavity injection mold according to claim 2, characterized in that: The lower die assembly (10) comprises a lower die base (11) and a lower die plate (12); The top of the lower mold base (11) is fixedly connected to a lower mold plate (12), and the heat exchange tube (33) is fixedly connected to the inside of the lower mold plate (12).

4. A 64-cavity injection mold according to claim 3, characterized in that: A guide sleeve (13) is symmetrically provided on the top of the lower template (12), and the guide sleeve (13) and the guide column (24) are arranged opposite to each other.

5. A 64-cavity injection mold according to claim 4, characterized in that: The upper surface of the lower mold plate (12) is evenly and fixedly connected with a mold core (14), and the interior of the mold core (14) is evenly provided with a mold cavity (15).

6. A 64-cavity injection mold according to claim 5, characterized in that: A branch channel (16) is provided at the top of the mold core (14), a feed hole (17) is provided at one end of the branch channel (16), and the branch channel (16) is communicated with the mold cavity (15).

7. A 64-cavity injection mold according to claim 3, characterized in that: A guide rod (18) is symmetrically fixedly connected to the upper surface of the lower die base (11), and a spring (19) is sleeved on the outer side wall of the guide rod (18).

8. A 64-cavity injection mold according to claim 7, characterized in that: The outer wall of the guide rod (18) is slidably connected to a top plate (110), and the top plate (110) is arranged at the bottom end of the spring (19). The top of the top plate (110) is evenly fixedly connected to a top pin (111), and the top pin (111) is slidably connected to the inner wall of the lower template (12).

9. A 64-cavity injection molding process, applied to a 64-cavity injection mold as claimed in claims 1-8, characterized in that: The following steps are involved: Step 1: When closing the mold, the guide sleeve (13) and the guide pillar (24) cooperate to complete the positioning between the lower mold assembly (10) and the upper mold assembly (20), and after the positioning is completed, the upper mold assembly (20) moves downward to complete the closing of the mold; Step 2: The material enters the hot runner (28) through the gate (27), then enters the branch runner (16) through the hot runner (28), and finally enters the interior of each cavity (15) to complete the material injection work. The material is cooled and formed inside the cavity (15); Step 3: Cooling water is fed into the water inlet pipe (31), and the cooling water is discharged after passing through the water distribution plate (32), the heat exchange pipe (33), the manifold (34) and the water outlet pipe (35) in sequence, and heat is exchanged with the material in the heat exchange pipe (33); Step 4: After the product is cooled and formed, the upper mold assembly (20) moves upward to open the mold. During the mold opening process, the cutter (25) is used to cut off excess material. After the mold opening is completed, the ejector plate (110) and the ejector pin (111) move upward to eject the product.

10. A 64-cavity injection molding process according to claim 9, characterized in that: In step 2, when injecting the material, the heater (29) is used to maintain the temperature of the material during the injection process.

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