Core-pulling mold

Abstract

The utility model discloses a core-pulling mould which comprises an upper mould, a lower mould and a cooling structure, a pulling core used for controlling the cooling structure to move is arranged in the mould, the pulling core comprises a lower core-pulling needle, and the lower core-pulling needle is movably connected with the lower mould. The lower mold further comprises a lower core-pulling push plate which is connected with the lower core-pulling needle and controls the lower core-pulling needle to move linearly, the lower core-pulling push plate is connected with a first action part, a locking structure is further arranged on the moving path of the lower core-pulling push plate, and the moving position of the lower core-pulling push plate is limited through the locking structure. The utility model discloses.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a core-pulling mold. Background Technology

[0002] IPM modules, IGBT modules, and all-silicon carbide power modules are all high-power devices, and they all have heat sinks for heat dissipation. Heat dissipation is divided into DBC (direct copper-clad ceramic substrate) exposed heat dissipation and lead frame fully encapsulated offset heat dissipation. In both of these heat dissipation methods, the heat sink needs to be fixed in place by ejector pins during mold packaging. When the resin is semi-cured, the ejector pins are pulled back and the resin continues to fill the gaps left by the ejector pins, thus completing the product packaging.

[0003] During the production process, the position of the heat sink needs to be precisely adjusted to ensure the accuracy of the heat sink size and position. Currently, domestic molds of this type do not have a complete core-pulling function, which makes it impossible to improve product quality and yield, affecting sealing effect and production efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology by proposing a core-pulling mold that can precisely adjust the size and position of the heat sink of the product to meet the needs of the production of this type of product.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A core-pulling mold includes an upper mold, a lower mold, and a cooling structure. The mold contains a core-pulling mechanism for controlling the movement of the cooling structure. The core-pulling mechanism includes a lower core-pulling pin, which is movably connected to the lower mold. The lower mold also includes a lower core-pulling push plate connected to the lower core-pulling pin and controlling its linear movement. The lower core-pulling push plate is connected to an actuating component. A locking structure is provided along the movement path of the lower core-pulling push plate to restrict its position. The locking structure includes a first spring-loaded rod located along the movement path of the lower core-pulling push plate and in the same direction as its movement, and a second spring-loaded rod located along the movement path of the lower core-pulling push plate and perpendicular to its movement. Both spring-loaded rods are elastic. After the upper and lower molds are closed, the first spring-loaded rod is pressed downwards, squeezing the second spring-loaded rod outwards. After being squeezed outwards, the second spring-loaded rod is offset from the movement path of the lower core-pulling push plate.

[0007] It should be noted that when the mold is open, spring rod one and spring rod two automatically reset under the action of elastic force. Spring rod one moves upward and returns to the top position, while spring rod two moves inward and returns to the inner position. After returning to the inner position, spring rod two is located on the moving path of the lower core-pulling push plate, which can limit the movement of the lower core-pulling push plate.

[0008] The locking structure can lock and limit the initial position of the lower core-pulling push plate, ensuring its accuracy and stability during subsequent adjustment. At the same time, the locking structure can automatically adjust and lock during mold closing, meeting the needs of automated production.

[0009] Preferably, the upper end of the lower core-pulling push plate is also provided with a lower slider, the lower slider is located on the moving path of the spring-loaded rod, and the lower end of the spring-loaded rod is provided with a chamfer that matches the upper surface of the lower slider.

[0010] Preferably, it also includes a lower ejector plate and a lower push plate connected to the lower core-pulling ejector plate, so that the lower core-pulling ejector plate, the lower push plate and the lower ejector plate can be ejected simultaneously when the mold is opened.

[0011] Preferably, springs are respectively sleeved on the outer sides of the first and second spring-loaded rods.

[0012] Preferably, the upper mold further includes an upper core-pulling pin and an upper core-pulling push plate for controlling the up and down movement of the upper core-pulling pin, and the upper core-pulling push plate is connected to an actuating component two.

[0013] Preferably, it also includes a limiting post, which is located on the moving path of the upper core-pulling pusher plate and is used to control the moving distance of the upper core-pulling pusher plate.

[0014] Finally, it should be noted that the core-pulling pins located on the inside allow for precise adjustment of the position of the cooling structure (heat sink), enabling accurate adjustment and fixation of the cooling structure's position and dimensions, thus meeting the needs of product manufacturing.

[0015] It should also be noted that the appendix Figure 1 The direction of the middle arrow indicates the direction of movement of the corresponding parts during and after mold closing. During mold closing, spring rod one is pressed and moves downward, while the lower slide and spring rod two are pressed by spring rod one and move to the left. After mold closing, the upper and lower core-pulling push plates can move in the corresponding directions under the action of the moving parts, thereby realizing the operation control of the core-pulling pin.

[0016] Compared with the prior art, the advantages of this utility model are as follows:

[0017] This utility model can meet the production needs of packaging molds for IPM modules, IGBT modules and fully carbonized power modules, and can precisely adjust the size and position of the heat sink to meet the production needs of this type of product. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the upper and lower molds of this utility model in the closed state.

[0019] Figure 2 This is a schematic diagram of the upper and lower molds of this utility model in the mold-opening state.

[0020] Figure 3 This utility model Figure 2 A magnified structural diagram at point A.

[0021] In the diagram: 1. Upper core-pulling push plate; 2. Upper push plate; 3. Upper top rod fixing plate; 4. Spring rod one; 5. Lower top rod fixing plate; 6. Lower push plate; 7. Spring rod two; 8. Lower slider; 9. Lower core-pulling push plate; 10. Lower core-pulling pin; 11. Upper core-pulling pin; 12. Limiting post. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0024] See attached document Figure 1 - Appendix Figure 3 A core-pulling mold, as detailed in the attached document. Figure 1 As shown, the IC packaging mold structure with core pulling mechanism is as follows: the core pulling pin rises and retracts when the upper and lower molds are closed. The core pulling process of the lower mold is that the spring pressure rod 4 is inserted into the guide hole of the lower slider 8 to make the lower slider move outward. At this time, the lower core pulling push plate 9 can move up and down to complete the rising and retracting action of the lower core pulling pin 10. The lower push plate 6 and the lower push rod fixing plate 5 remain stationary.

[0025] The core-pulling process of the upper mold is relatively simple. The upper core-pulling push plate 1 is set in the upper mold box. It moves up and down to complete the rising and retracting action of the upper core-pulling pin 11 without affecting the movement of the upper push plate 2 and the upper ejector pin fixing plate 3. The limit post 12 can control the movement distance of the upper core-pulling push plate.

[0026] Details are as attached Figure 2As shown, when the mold is open, spring bar 1 4 is in the pop-out state under the action of spring force, and spring bar 2 7 pushes the lower slider 8 to move inward under the action of spring force. At this time, when the mold is opened and ejected, the lower core-pulling push plate 9, the lower push plate 6 and the lower ejector rod fixing plate 5 can be ejected simultaneously, and the product is ejected.

[0027] When the mold is open, the core-pulling ejector plate 1 and the upper core-pulling pin 11 move upward to return to their initial positions under the action of the upper mold spring force, while the upper push plate 2 and the upper ejector pin fixing plate 3 move downward to return to their initial positions, ejecting the product out of the upper mold, and the limiting pin 12 remains fixed.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A core-pulling mold, comprising an upper mold, a lower mold, and a cooling structure, wherein the mold contains a core-pulling mechanism for controlling the movement of the cooling structure, characterized in that: The core pulling includes a lower core pulling pin (10), which is movably connected to the lower mold. The lower mold also includes a lower core pulling push plate (9) connected to the lower core pulling pin (10) and controlling the linear movement of the lower core pulling pin (10). The lower core pulling push plate (9) is connected to an actuating component. A locking structure is also provided on the movement path of the lower core pulling push plate (9) to restrict the movement position of the lower core pulling push plate (9). The locking structure includes a spring-loaded rod 1 (4) located on the moving path of the lower core-pulling push plate (9) and in the same direction of movement as the lower core-pulling push plate (9), and a spring-loaded rod 2 (7) located on the moving path of the lower core-pulling push plate (9) and perpendicular to the direction of movement of the lower core-pulling push plate (9). Both the spring-loaded rod 1 (4) and the spring-loaded rod 2 (7) are elastic. When the upper and lower molds are closed, the first spring bar (4) is pressed down and moves downward, squeezing the second spring bar (7) to the outside. After the second spring bar (7) is squeezed to the outside, it is out of sync with the movement path of the lower core-pulling push plate (9).

2. The core-pulling mold according to claim 1, characterized in that, The lower core-pulling push plate (9) is also provided with a lower slider (8) at its upper end. The lower slider (8) is located on the movement path of the spring pressure rod (7). The lower end of the spring pressure rod (4) is provided with a guide angle that matches the upper surface of the lower slider (8).

3. The core-pulling mold according to claim 1, characterized in that, It also includes a lower ejector plate (5) and a lower push plate (6) connected to the lower core-pulling push plate (9). When the mold is opened, the lower core-pulling push plate (9), the lower push plate (6) and the lower ejector plate (5) can be ejected simultaneously.

4. A core-pulling mold according to claim 1, characterized in that, Springs are respectively fitted on the outer sides of the spring rod one (4) and spring rod two (7).

5. A core-pulling mold according to claim 1, characterized in that, The upper mold also includes an upper core-pulling pin (11) and an upper core-pulling push plate (1) for controlling the upper core-pulling pin (11) to move up and down. The upper core-pulling push plate (1) is connected to an action component two.

6. A core-pulling mold according to claim 5, characterized in that, It also includes a limiting post (12), which is located on the moving path of the upper core-pulling push plate (1) and is used to control the moving distance of the upper core-pulling push plate (1).

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