Silver silicon carbide sintering mold convenient to demold

Abstract

The utility model relates to the technical field of sintering moulds, in particular to a silicon carbide silver sintering mould convenient to demould, which comprises a movable mould and a fixed mould arranged below the movable mould, a plurality of through holes communicated with the outside are arranged on the bottom wall of a forming cavity in the fixed mould, and a first cylinder is arranged below the fixed mould. A rectangular sleeve is fixedly installed at the tail end of a telescopic shaft of the first air cylinder, a top plate is arranged above the rectangular sleeve, a rectangular inserting column is fixedly installed at the center of the bottom face of the top plate, the rectangular inserting column and the rectangular sleeve are matched in an inserted mode, the rectangular inserting column is fixedly installed on the rectangular sleeve through a fastening bolt, and a plurality of inserting holes arranged in a matrix mode are formed in the top plate. And ejector pins are inserted in the inserting holes in a matched mode, fixing discs are fixedly installed at the bottom ends of the ejector pins and detachably installed on the bottom face of the top plate, and the ejector pins are located in the through holes and are in sliding connection with the through holes. The mold is convenient to demold and disassemble and replace the ejector pin, and is convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of sintering mold technology, and more specifically, to a silicon carbide silver sintering mold that is easy to demold. Background Technology

[0002] With the rapid development of the electronics industry, electronic products are constantly evolving towards lighter weight, thinner thickness, smaller size, lower power consumption, more complex functions, and higher reliability. Silicon carbide, as a wide bandgap semiconductor material, has been widely used in power electronic devices due to its excellent high temperature resistance, high voltage resistance, and high frequency characteristics.

[0003] Traditional power module packaging technology mainly relies on soft soldering, which connects the chip to the substrate via soft soldering. However, this connection method has obvious limitations. In order to overcome the limitations of traditional packaging technology, silver sintering technology has emerged. Silver sintering technology is usually carried out in a corresponding silicon carbide silver sintering mold. There are many types of silicon carbide silver sintering molds on the market. However, due to the strong adhesion between the silver sintering bonding layer and the mold surface, it is usually necessary to install a corresponding demolding component on the mold to perform the demolding operation.

[0004] Common demolding components typically use cylinders to drive corresponding ejector pins, thus pushing the workpiece outwards to complete the demolding operation. However, while these components can achieve demolding, the ejector pins are fixedly mounted on the corresponding plates, making them non-removable and non-replaceable. Because the ejector pins and mold are slidably connected, friction and wear occur. If the ejector pins are damaged and cannot be easily removed and replaced, the entire mold becomes unusable, causing inconvenience to the user. Therefore, we propose a silicon carbide silver sintering mold that facilitates demolding. Utility Model Content

[0005] The purpose of this invention is to provide a silicon carbide silver sintering mold that is easy to demold, so as to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A silicon carbide silver sintering mold for easy demolding includes a moving mold and a fixed mold located below the moving mold. The bottom wall of the molding chamber within the fixed mold has multiple through holes communicating with the outside. A first cylinder is located below the fixed mold, and a rectangular sleeve is fixedly installed at the end of the telescopic shaft of the first cylinder. A top plate is located above the rectangular sleeve, and a rectangular insert is fixedly installed at the center of the bottom surface of the top plate. The rectangular insert is inserted into the rectangular sleeve and fixedly installed on the rectangular sleeve by fastening bolts. The top plate has multiple insertion holes arranged in a matrix, and ejector pins are inserted into these holes. A fixing plate is fixedly installed at the bottom end of each ejector pin, and the fixing plate is detachably installed on the bottom surface of the top plate. The ejector pin is located within the through holes and slidably connected to the through holes.

[0008] Preferably, the size of the ejector pin is adapted to the size of the through hole, and the fixing plate is fixedly installed on the bottom surface of the top plate by a plurality of fastening screws.

[0009] Preferably, the rectangular sleeve has a rectangular groove whose top is connected to the outside, and the rectangular insert is located in the rectangular groove and is inserted into the rectangular groove.

[0010] Preferably, both the rectangular post and the rectangular groove have rectangular cross-sections, and the dimensions of the rectangular post are adapted to the dimensions of the rectangular groove.

[0011] Preferably, a nut is fixedly installed on the side of the rectangular sleeve, and the fastening bolt passes through the rectangular sleeve and the rectangular insert and is threadedly connected to the nut.

[0012] Preferably, a support frame is fixedly installed at the bottom of the fixed mold, and an exposure hole is provided on the support frame. The first cylinder is fixedly installed on the bottom wall of the exposure hole.

[0013] Preferably, a second cylinder is provided on one side of the moving mold and the fixed mold, and a pusher plate is fixedly installed at the end of the telescopic shaft of the second cylinder.

[0014] Preferably, the length of the ejector pin is greater than the depth of the molding cavity, and the top plate is located below the fixed mold.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model utilizes a first cylinder. When the first cylinder operates, the telescopic shaft on it extends, causing the ejector pin to move upward, thereby ejecting the workpiece from the molding cavity and completing the demolding operation. In addition, since the rectangular insert and the rectangular sleeve are detachable, the top plate can be removed after the rectangular insert is disassembled. Since the fixing plate is also detachable, the ejector pin can be easily replaced, achieving the effect of easy demolding and easy disassembly and replacement of the ejector pin.

[0017] 2. This utility model, through the provision of a second cylinder and a pusher plate, enables the ejector pin to push the workpiece out of the forming cavity, and then uses the second cylinder to drive the pusher plate to move, thereby pushing the workpiece to the unloading side for unloading. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0020] Figure 3 This is one of the partial structural schematic diagrams of this utility model;

[0021] Figure 4 This is the second partial structural schematic diagram of the present utility model;

[0022] The meanings of the labels in the diagram are as follows:

[0023] 1. Moving mold; 10. Fixed mold; 11. Molding chamber; 111. Through hole; 12. Support frame; 121. Exposure hole;

[0024] 2. First cylinder; 20. Rectangular sleeve; 201. Rectangular groove; 21. Nut; 22. Rectangular insert; 23. Top plate; 231. Insertion hole; 24. Fastening bolt; 25. Ejector pin; 251. Fixing plate;

[0025] 3. Second cylinder; 30. Pusher plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-4This utility model provides a technical solution: a silicon carbide silver sintering mold that is easy to demold, including a moving mold 1 and a fixed mold 10 disposed below the moving mold 1. The bottom wall of the molding chamber 11 in the fixed mold 10 is provided with a plurality of through holes 111 that communicate with the outside. The through holes 111 are arranged in a vertical direction. A first cylinder 2 is disposed below the fixed mold 10. A rectangular sleeve 20 is fixedly installed at the end of the telescopic shaft of the first cylinder 2. A top plate 23 is disposed above the rectangular sleeve 20. A rectangular insert 22 is fixedly installed at the center of the bottom surface of the top plate 23. The rectangular insert 22 and the rectangular sleeve 20 are inserted into each other. The rectangular insert 22 is fixedly installed on the rectangular sleeve 20 by fastening bolts 24, which facilitates the fixed installation and disassembly operation.

[0028] Specifically, the top plate 23 has multiple insertion holes 231 arranged in a matrix. A ejector pin 25 is inserted into the insertion hole 231. A fixing plate 251 is fixedly installed at the bottom end of the ejector pin 25. The fixing plate 251 is detachably installed on the bottom surface of the top plate 23. The ejector pin 25 is located in the through hole 111 and is slidably connected to the through hole 111. The size of the ejector pin 25 is adapted to the size of the through hole 111. The fixing plate 251 is fixedly installed on the bottom surface of the top plate 23 by multiple fastening screws, which facilitates the disassembly and replacement of the ejector pin 25.

[0029] In this embodiment, a rectangular slot 201 with its top connected to the outside is provided inside the rectangular sleeve 20. A rectangular insert 22 is located inside the rectangular slot 201 and is inserted into the rectangular slot 201. The cross-sections of the rectangular insert 22 and the rectangular slot 201 are both rectangular. The size of the rectangular insert 22 is adapted to the size of the rectangular slot 201 to achieve stable assembly operation.

[0030] Specifically, a nut 21 is fixedly installed on the side of the rectangular sleeve 20, and a fastening bolt 24 passes through the rectangular sleeve 20 and the rectangular insert 22 and is threadedly connected to the nut 21 to realize the tightening and fixing operation of the fastening bolt 24.

[0031] Furthermore, a support frame 12 is fixedly installed at the bottom of the fixed mold 10. An exposure hole 121 is provided on the support frame 12. The first cylinder 2 is fixedly installed on the bottom wall of the exposure hole 121 to realize normal assembly operation.

[0032] In addition, a second cylinder 3 is provided on one side of the moving mold 1 and the fixed mold 10. A pusher plate 30 is fixedly installed at the end of the telescopic shaft of the second cylinder 3. After the ejector pin 25 pushes the workpiece out of the molding chamber 11, the pusher plate 30 can push the workpiece to the unloading side for unloading operation.

[0033] It is worth noting that the length of the ejector pin 25 is greater than the depth of the molding chamber 11, and the top plate 23 is located below the fixed mold 10, so that the ejector pin 25 can normally push the workpiece in the molding chamber 11 outward to complete the demolding operation.

[0034] Finally, it should be noted that the components involved in this utility model, such as the first cylinder 2, the second cylinder 3, and the external power supply, are all general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and the matching controller and power supply, are connected by wires. The specific connection methods should refer to the working principle of this utility model. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.

[0035] When using the silicon carbide silver sintering mold of this utility model, after the workpiece is formed in the molding chamber 11 and the mold is opened, the first cylinder 2 is started and made to work. When the first cylinder 2 works, the telescopic shaft on it extends and drives the ejector pin 25 to move upward. The upward movement of the ejector pin 25 realizes the ejection of the plastic part in the molding chamber 11 outward, completing the demolding operation. Then the second cylinder 3 is started and made to work. When the second cylinder 3 works, the telescopic shaft on it extends and drives the pusher plate 30 to push the workpiece ejected by the ejector pin 25 to the unloading side for unloading operation.

[0036] When replacing the ejector pin 25, start the first cylinder 2, and its telescopic shaft will shorten, causing the ejector pin 25 to move downward. After the ejector pin 25 moves to the exposed hole 121, unscrew the fastening bolt 24, then remove the rectangular insert 22 and the top plate 23, and then remove the fixing plate 251 to remove the ejector pin 25. Replace the ejector pin 25 and install it. After installation, continue to ensure that the telescopic shaft of the first cylinder 2 extends to drive the ejector pin 25 into the through hole 111.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A silicon carbide silver sintering mold for easy demolding, comprising a moving mold (1) and a fixed mold (10) disposed below the moving mold (1), characterized in that: The bottom wall of the molding chamber (11) inside the fixed mold (10) is provided with multiple through holes (111) that communicate with the outside. A first cylinder (2) is provided below the fixed mold (10). A rectangular sleeve (20) is fixedly installed at the end of the telescopic shaft of the first cylinder (2). A top plate (23) is provided above the rectangular sleeve (20). A rectangular insert (22) is fixedly installed at the center of the bottom surface of the top plate (23). The rectangular insert (22) is inserted into the rectangular sleeve (20). The column (22) is fixedly installed on the rectangular sleeve (20) by fastening bolts (24). The top plate (23) is provided with a plurality of insertion holes (231) arranged in a matrix. A pin (25) is inserted into the insertion hole (231). A fixing plate (251) is fixedly installed at the bottom end of the pin (25). The fixing plate (251) is detachably installed on the bottom surface of the top plate (23). The pin (25) is located in the through hole (111) and is slidably connected to the through hole (111).

2. The silicon carbide silver sintering mold for easy demolding according to claim 1, characterized in that: The size of the ejector pin (25) is adapted to the size of the through hole (111), and the fixing plate (251) is fixedly installed on the bottom surface of the top plate (23) by a plurality of fastening screws.

3. The silicon carbide silver sintering mold for easy demolding according to claim 1, characterized in that: The rectangular sleeve (20) is provided with a rectangular groove (201) that is connected to the outside at the top. The rectangular insert (22) is located in the rectangular groove (201) and is inserted into the rectangular groove (201).

4. The silicon carbide silver sintering mold for easy demolding according to claim 3, characterized in that: The rectangular insert (22) and the rectangular groove (201) both have rectangular cross sections, and the dimensions of the rectangular insert (22) are adapted to the dimensions of the rectangular groove (201).

5. The silicon carbide silver sintering mold for easy demolding according to claim 1, characterized in that: A nut (21) is fixedly installed on the side of the rectangular sleeve (20), and the fastening bolt (24) passes through the rectangular sleeve (20) and the rectangular insert (22) and is threadedly connected to the nut (21).

6. The silicon carbide silver sintering mold for easy demolding according to claim 1, characterized in that: A support frame (12) is fixedly installed at the bottom of the fixed mold (10), and an exposure hole (121) is provided on the support frame (12). The first cylinder (2) is fixedly installed on the bottom wall of the exposure hole (121).

7. The silicon carbide silver sintering mold for easy demolding according to claim 1, characterized in that: A second cylinder (3) is provided on one side of the moving mold (1) and the fixed mold (10), and a pusher plate (30) is fixedly installed at the end of the telescopic shaft of the second cylinder (3).

8. The silicon carbide silver sintering mold for easy demolding according to claim 1, characterized in that: The length of the ejector pin (25) is greater than the depth of the molding chamber (11), and the top plate (23) is located below the fixed mold (10).

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