Die-casting die

Abstract

The utility model relates to the technical field of preparation of heat dissipation shells of 5G base stations, and aims to solve the technical problem that the requirements of customers on product weight cannot be met. In order to solve the technical problem, the utility model provides the die-casting die. The mold comprises a rear mold frame, a rear mold core is arranged on the front side face of the rear mold frame, and the rear mold core is provided with a mold cavity used for product forming; the mold foot is connected to the rear side of the rear mold frame, and a cavity is formed in the front side face of the mold foot; the ejection assembly is used for forwards ejecting a product; the ejection assembly comprises a first ejector plate, a second ejector plate located in front of the first ejector plate, a plurality of accelerated ejection components, an ejection block and an ejector pin; the first ejector plate and the second ejector plate are arranged in the cavity; the plurality of accelerated ejection components are arranged between the first ejector plate and the second ejector plate at intervals; the rear end of the ejector block is connected with the first ejector plate, and the front end of the ejector block extends into the rear mold core; the rear end of the thimble is connected with the second thimble plate. The weight requirement of a customer is met.

Description

Technical Field

[0001] This utility model relates to the field of 5G base station heat sink preparation technology, and in particular to a die-casting mold. Background Technology

[0002] The heat sink casing for 5G base stations is difficult to mold due to the small draft angle and deep, tight gripping force of the heat dissipation ribs, making demolding difficult. In addition, the heat sink casing is not only difficult to demold, but also subject to strict weight limits.

[0003] The traditional ejection method for 5G base station heat sink die-casting molds is to design more rectangular ejector pins on the top of the heat sink fins. This allows the product to be better supported during ejection. However, each rectangular ejector pin increases the product weight by 10 to 20 grams. Multiple rectangular ejector pins increase the weight of the 5G base station heat sink by about 1.5 kilograms, so it cannot meet the customer's weight requirements for 5G base station heat sinks.

[0004] This shows that the existing ejection method has the problems of difficulty in demolding and excessive weight of the 5G base station heat sink. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the above-mentioned problems existing in the prior art.

[0006] To solve the above-mentioned technical problems, this utility model provides a die-casting mold, comprising:

[0007] The rear mold frame has a rear mold core on its front side, and the rear mold core has a mold cavity for product molding.

[0008] The mold foot is connected to the rear side of the rear mold frame, and the front side of the mold foot has a cavity;

[0009] An ejection assembly is used to eject products forward. The ejection assembly includes a first ejector plate, a second ejector plate located in front of the first ejector plate, multiple accelerating ejection components, an ejector block, and ejector pins. Both the first and second ejector plates are disposed in a cavity. The multiple accelerating ejection components are spaced apart between the first and second ejector plates. The ejector block extends forward and backward, with its rear end connected to the first ejector plate and its front end extending into the rear mold core. The ejector pins extend forward and backward, with their rear ends connected to the second ejector plate.

[0010] The ejection stroke of the ejection assembly includes a first stroke and a second stroke; the ejector block and ejector pin eject synchronously to complete the first stroke; the ejector block and ejector pin eject again, and under the action of the acceleration ejection component, the ejection speed of the ejector pin is greater than the ejection speed of the ejector block to complete the second stroke.

[0011] In one embodiment of the present invention, the accelerated ejection component includes an accelerated ejection member and a first stroke limiting member; the accelerated ejection member includes a main body and a first protrusion and a second protrusion connected to both ends of the main body; the main body is rotatably connected to the front side of the first ejector plate; the first protrusion and the second protrusion are arranged at a predetermined angle; the first protrusion abuts against the rear side of the second ejector plate; the first stroke limiting member is disposed in the cavity and located above the accelerated ejection member, and the first stroke limiting member cooperates with the second protrusion.

[0012] In one embodiment of the present invention, the cavity is divided into a first cavity and a second cavity, with the second cavity connected above the first cavity; a step is formed at the connection between the first cavity and the second cavity, and the step serves as a first travel limiter.

[0013] In one embodiment of the present invention, the second ejector plate is provided with a first through hole extending forward and backward; the ejection assembly further includes a second stroke limiting rod; the tail end of the second stroke limiting rod is connected to the first ejector plate, the second stroke limiting rod is inserted into the first through hole, and the front end of the second stroke limiting rod is used to abut against the front side of the second ejector plate.

[0014] In one embodiment of the present invention, the front end of the second stroke limiting rod is provided with a head with a cross-sectional area larger than that of its rod portion; the front side of the second ejector plate is provided with a groove that matches the head.

[0015] In one embodiment of this utility model, the application further includes a base plate, which is connected to the rear side of the mold foot; the base plate, the mold foot, and the rear mold frame are fixedly connected by bolts.

[0016] In one embodiment of the present invention, the application further includes a guide member for guiding the front and rear movement of the first ejector plate and the second ejector plate; the guide member is connected between the base plate and the rear mold frame and extends front and rear; both the first ejector plate and the second ejector plate are provided with guide sleeves that cooperate with the guide member.

[0017] In one embodiment of the present invention, the ejection assembly further includes an ejection power unit and an ejection rod connected to the output end of the ejection power unit, the ejection rod abutting against the bottom of the first ejector plate; a second through hole for the extension and retraction of the ejection rod is provided on the bottom plate.

[0018] In one embodiment of the present invention, a plurality of pads are provided between the first ejector plate and the second ejector plate, and the plurality of pads are laid on the rear side of the second ejector plate or the front side of the first ejector plate.

[0019] In one embodiment of this utility model, the top block is connected to the first ejector plate via a long screw.

[0020] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0021] The die-casting mold described in this utility model uses an ejector pin and an ejector block in cooperation. During product molding, the ejector block becomes part of the product. In the first stroke, the ejector pin and ejector block eject most of the product. In the second stroke, the ejector pin accelerates the ejection, causing the ejector block to separate from the product, thus completing the demolding process. This avoids adding weight to the product, thereby meeting the customer's weight requirements. Attached Figure Description

[0022] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of the interior of a die-casting mold according to a preferred embodiment of the present invention. Figure 1 ;

[0024] Figure 2 A schematic diagram of the interior of a die-casting mold Figure 2 (Second stroke pushed out);

[0025] Figure 3 yes Figure 1 A schematic diagram of the structure of the accelerated ejection component in a die-casting mold;

[0026] Figure 4 It is to utilize Figure 1 A schematic diagram of the ejection process in a die-casting mold (forming - first stroke ejection - second stroke ejection);

[0027] Explanation of reference numerals in the accompanying drawings: 100, rear mold frame; 110, rear mold core; 111, mold cavity;

[0028] 200, mold foot; 210, cavity; 211, first cavity; 212, second cavity;

[0029] 300. Ejector assembly; 310. First ejector plate; 320. Second ejector plate; 321. First through hole; 322. Countersink; 330. Accelerating ejection component; 331. Accelerating ejection piece; 3311. Main body; 3312. First protrusion; 3313. Second protrusion; 332. First stroke limiter; 340. Ejector block; 350. Ejector pin; 360. Second stroke limiter rod; 361. Rod part; 362. Head; 370. Ejector rod; 380. Long screw;

[0030] 400. Products;

[0031] 500, base plate; 510, second through hole;

[0032] 600. Guide assembly; 610. Guide component; 620. Guide sleeve. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0034] Die-casting molds include a rear mold frame and a front mold frame, and the product is formed by pressing the rear mold frame and the front mold frame together. The side of the rear mold frame facing the front mold frame is called the "front", and the side of the rear mold frame away from the front mold frame is called the "rear".

[0035] The dimensions of the 5G base station heat sink are approximately 560*400mm, with a heat dissipation fin height of approximately 70mm. It is manufactured using aluminum alloy die casting. In some comparative embodiments, rectangular ejector pins of approximately 3*14mm are placed on the heat dissipation fins to eject the product from the mold for demolding. However, these rectangular ejector pins increase the weight of the product (5G base station heat sink). Depending on the height and thickness of the heat dissipation fins, each rectangular ejector pin of this specification weighs 10-17g, thus adding approximately 1-2kg to the product's weight, which does not meet customer requirements for product weight.

[0036] However, to meet the customer's requirements for product weight, rectangular ejector pins cannot be designed on the product's heat dissipation fins. But no matter how many ordinary ejector pins are added, they cannot directly act on the heat dissipation fins, and the product will inevitably stick to the mold, making production impossible.

[0037] Therefore, refer to Figures 1-4 As shown, this utility model embodiment provides a die-casting mold, including:

[0038] The rear mold frame 100 has a rear mold core 110 on its front side, and the rear mold core 110 has a mold cavity 111 for molding the product 400;

[0039] The mold foot 200 is connected to the rear side of the rear mold frame 100, and the front side of the mold foot 200 is provided with a cavity 210;

[0040] Ejector assembly 300 ejects forward to eject product 400. Ejector assembly 300 includes a first ejector plate 310, a second ejector plate 320 located in front of the first ejector plate 310, multiple accelerating ejection components 330, an ejector block 340, and ejector pins 350. The first ejector plate 310 and the second ejector plate 320 are both disposed within cavity 210. The multiple accelerating ejection components 330 are spaced apart between the first ejector plate 310 and the second ejector plate 320. The ejector block 340 extends forward and backward, with its rear end connected to the first ejector plate 310 and its front end extending into the rear mold core 110. The ejector pin 350 extends forward and backward, with its rear end connected to the second ejector plate 320. The first ejector plate 310 is used to fix the ejector block 340 to complete its ejection and resetting. The second ejector plate 320 is used to fix the ejector pin 350 to complete its ejection and resetting.

[0041] The ejection stroke of the ejection assembly 300 includes a first stroke and a second stroke; the ejector block 340 and the ejector pin 350 eject synchronously to complete the first stroke; the ejector block 340 and the ejector pin 350 eject again, and under the action of the accelerating ejection component 330, the ejection speed of the ejector pin 350 is greater than the ejection speed of the ejector block 340 to complete the second stroke.

[0042] Specifically, in this embodiment, the first ejector plate 310 and the second ejector plate 320 move upward simultaneously, thereby driving the ejector pin 350 and the ejector block 340 to move upward synchronously to complete the first stroke of ejection, which will cause most of the product 400 to leave the mold cavity 111; when the set stroke of the first stroke of ejection is reached, the acceleration ejection component 330 pushes the second ejector plate 320 to accelerate, and the second ejector plate 320 disengages from the first ejector plate 310. At this time, the ejection speed of the second ejector plate 320 is faster than the ejection speed of the first ejector plate 310. Thus, the ejector pin 350, driven by the second ejector plate 320, causes the product 400 to disengage from the ejector block 340, and causes the ejector block 340 to separate from the product 400, finally completing the demolding. Therefore, this embodiment utilizes the cooperation of ejector pin 350 and ejector block 340. During the molding of product 400, ejector block 340 is part of product 400. In the first stroke, ejector pin 350 and ejector block 340 eject most of product 400. In the second stroke, ejector pin 350 accelerates the ejection, causing ejector block 340 to separate from product 400, thus completing demolding of product 400. This avoids adding weight to product 400, thereby meeting the customer's weight requirements.

[0043] Furthermore, the accelerated ejection component 330 includes an accelerated ejection member 331 and a first stroke limiting member 332. The accelerated ejection member 331 includes a main body 3311 and a first extension 3312 and a second extension 3313 connected to both ends of the main body 3311. The main body 3311 is rotatably connected to the front side of the first ejector plate 310. The first extension 3312 and the second extension 3313 are set at a predetermined angle. The first extension 3312 abuts against the rear side of the second ejector plate 320. The first stroke limiting member 332 is disposed in the cavity 210 and located above the accelerated ejection member 331, and the first stroke limiting member 332 cooperates with the second extension 3313. Specifically, under the push of the ejector rod 370, the first ejector plate 310 and the second ejector plate 320 move forward together to complete the first stroke ejection, thereby causing the vast majority of the product 400 to leave the mold cavity 111. When the accelerating ejector 331 impacts the first stroke limiter 332, it rotates to push the second ejector plate 320 to accelerate its ejection. Thus, during the second stroke, the ejection speed of the ejector pin 350 is greater than the ejection speed of the ejector block 340, ultimately ejecting the product 400 and simultaneously separating it from the ejector block 340, thus completing the demolding process. This embodiment features a simple structure and reliable operation.

[0044] Furthermore, the cavity 210 is divided into a first cavity 211 and a second cavity 212, with the second cavity 212 connected to the upper part of the first cavity 211. A step is formed at the connection between the first cavity 211 and the second cavity 212, serving as a first stroke limiting member 332. Specifically, this embodiment utilizes the difference in cross-sectional area between the first cavity 211 and the second cavity 212 to form a step at the connection between the second cavity 212 and the first cavity 211, thereby using the step as a first stroke limiting member 332. This simplifies the manufacturing process and reduces costs.

[0045] Furthermore, the second ejector plate 320 is provided with a first through hole 321 extending front and rear; the ejection assembly 300 also includes a second stroke limiting rod 360; the tail end of the second stroke limiting rod 360 is connected to the first ejector plate 310, the second stroke limiting rod 360 is inserted into the first through hole 321, and the front end of the second stroke limiting rod 360 is used to abut against the front side of the second ejector plate 320. Specifically, the second stroke limiting rod 360 provided in this embodiment prevents the second ejector plate 320 from moving forward beyond its limit.

[0046] Furthermore, the front end of the second stroke limiting rod 360 is provided with a head 362, the cross-sectional area of ​​which is larger than that of its rod portion 361; the front side of the second ejector plate 320 is provided with a recess 322 that matches the head 362. When the second ejector plate 320 is pushed forward to the stroke limit position, the head 362 is locked in the recess 322, thereby limiting the second ejector plate 320.

[0047] Furthermore, this application also includes a base plate 500, which is connected to the rear side of the mold foot 200; the base plate 500, the mold foot 200, and the rear mold frame 100 are fixedly connected by bolts. Specifically, the connection method of this embodiment is stable and reliable, and easy to replace.

[0048] Furthermore, this application also includes a guide assembly 600 for guiding the forward and backward movement of the first ejector plate 310 and the second ejector plate 320. The guide assembly 600 includes a guide member 610 and a guide sleeve 620. The guide member 610 is connected between the base plate 500 and the rear mold frame 100, and extends forward and backward. The first ejector plate 310 and the second ejector plate 320 are each provided with a guide sleeve 620 that cooperates with the guide member 610. Specifically, in this embodiment, the guide assembly 600 provides guidance for the forward and backward movement of the first ejector plate 310 and the second ejector plate 320 to avoid misalignment.

[0049] Furthermore, the ejection assembly 300 also includes an ejection power unit and an ejection rod 370 connected to the output end of the ejection power unit. The ejection rod 370 abuts against the bottom of the first ejector plate 310. A second through hole 510 for the extension and retraction of the ejection rod 370 is provided on the base plate 500. Specifically, in this embodiment, the ejection rod 370 can extend forward to eject the product 400 and retract backward under the drive of the ejection power unit. It has a simple structure and stable and reliable operation.

[0050] Furthermore, a plurality of pads are provided between the first ejector plate 310 and the second ejector plate 320, with the pads placed on the rear side of the second ejector plate 320 or the front side of the first ejector plate 310. Specifically, after the first ejector plate 310 and the second ejector plate 320 are reset, the pads are provided to prevent the second ejector plate 320 from directly pressing on the first ejector plate 310 and causing damage to the first ejector plate 310.

[0051] Furthermore, the top block 340 is connected to the first ejector plate 310 via a long screw 380. One end of the long screw 380 is fixedly connected to the first ejector plate 310, and the other end of the long screw 380 is engaged with the top block 340.

[0052] This application saves approximately 1.5 kg of weight per product (400 units), resulting in economic benefits; and by reducing weight, it reduces losses during melting and cooling molding, thereby reducing carbon emissions.

[0053] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A die-casting mold, characterized in that: include: The rear mold frame has a rear mold core on its front side, and the rear mold core has a mold cavity for product molding. A mold foot is connected to the rear side of the rear mold frame, and the front side of the mold foot is provided with a cavity; An ejection assembly is used to eject products forward. The ejection assembly includes a first ejector plate, a second ejector plate located in front of the first ejector plate, multiple accelerating ejection components, an ejector block, and ejector pins. The first and second ejector plates are both disposed in the cavity. The multiple accelerating ejection components are spaced apart between the first and second ejector plates. The ejector block extends forward and backward, with its rear end connected to the first ejector plate and its front end extending into the rear mold core. The ejector pins extend forward and backward, with their rear ends connected to the second ejector plate. The ejection stroke of the ejection assembly includes a first stroke and a second stroke; the ejector block and the ejector pin eject synchronously to complete the first stroke; the ejector block and the ejector pin eject again, and under the action of the accelerating ejection component, the ejection speed of the ejector pin is greater than the ejection speed of the ejector block to complete the second stroke.

2. The die-casting mold according to claim 1, characterized in that: The accelerated ejection component includes an accelerated ejection member and a first stroke limiting member; the accelerated ejection member includes a main body and a first protrusion and a second protrusion connected to both ends of the main body; the main body is rotatably connected to the front side of the first ejector plate; the first protrusion and the second protrusion are arranged at a predetermined angle; the first protrusion abuts against the rear side of the second ejector plate; the first stroke limiting member is disposed in the cavity and located above the accelerated ejection member, and the first stroke limiting member cooperates with the second protrusion.

3. The die-casting mold according to claim 2, characterized in that: The cavity is divided into a first cavity and a second cavity, with the second cavity connected above the first cavity; a step is formed at the connection between the first cavity and the second cavity, and the step serves as the first travel limiter.

4. The die-casting mold according to claim 1, characterized in that: The second ejector plate is provided with a first through hole extending forward and backward; the ejection assembly also includes a second stroke limiting rod; the tail end of the second stroke limiting rod is connected to the first ejector plate, the second stroke limiting rod is inserted into the first through hole, and the front end of the second stroke limiting rod is used to abut against the front side of the second ejector plate.

5. The die-casting mold according to claim 4, characterized in that: The front end of the second travel limit rod is provided with a head with a cross-sectional area larger than that of the rod; the front side of the second ejector plate is provided with a groove that matches the head.

6. The die-casting mold according to claim 1, characterized in that: It also includes a base plate, which is connected to the rear side of the mold foot; the base plate, the mold foot, and the rear mold frame are fixedly connected by bolts.

7. The die-casting mold according to claim 6, characterized in that: It also includes a guide member for guiding the front and rear movement of the first ejector plate and the second ejector plate; the guide member is connected between the base plate and the rear mold frame and extends front and rear; both the first ejector plate and the second ejector plate are provided with guide sleeves that cooperate with the guide member.

8. The die-casting mold according to claim 6, characterized in that: The ejection assembly further includes an ejection power unit and an ejection rod connected to the output end of the ejection power unit. The ejection rod abuts against the bottom of the first ejector plate. A second through hole for the extension and retraction of the ejection rod is provided on the bottom plate.

9. The die-casting mold according to claim 1, characterized in that: A plurality of pads are provided between the first ejector plate and the second ejector plate, and the plurality of pads are laid on the rear side of the second ejector plate or the front side of the first ejector plate.

10. The die-casting mold according to claim 1, characterized in that: The top block is connected to the first ejector plate via a long screw.

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