Die casting mold for preparing a solder ball

Abstract

The present application relates to the technical field of tin ball manufacturing, and discloses an upper die and a lower die matched with the upper die, the upper die comprises a press block capable of moving up and down, a plurality of support rods are connected below the press block, a feeding plug is connected below the support rods, a feeding hole is formed on the feeding plug, the feeding plug is embedded in the center of the upper die-casting module, the lower die comprises a die base plate, a lower die-casting module is arranged at the center of the die base plate, the feeding plug is also embedded in the center of the lower die-casting module, and a feeding port is formed at the bottom center of the die base plate, the feeding port is communicated with the feeding channel of the feeding plug. The device can directly die-cast tin ball products through the press block, the lower die-casting module, the upper die-casting module, the feeding path in the die-casting die and the tin ball die, and the whole upper die-casting module can be matched without gap during die-casting cooperation, so that the oxidation of tin balls during die-casting can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tin ball manufacturing, in particular to a die casting mold for tin ball preparation. BACKGROUND

[0002] Tin balls are widely used in tinplate, flux, organic synthesis, chemical production, alloy manufacturing, and assembly of multi-group integrated circuits in the electronics industry, etc., and are also used as reagents for determining arsenic and phosphates, reducing agents, tinned products, etc. In the preparation process of tin balls, the existing method is to obtain tin ball finished products by die casting. However, in the process of die casting, tin balls are prone to oxidation, which affects the quality of the finished products. In addition, in the process of demolding the tin balls, the tin balls are not easy to demold due to their small size, resulting in low demolding efficiency and long demolding time, which further aggravates the oxidation.

[0003] The existing device for preparing and planting ball grid array packaging tin balls, disclosed in CN106684017B, includes a connecting rod connected to an external actuating mechanism, and a mounting seat connected to the connecting rod. The mounting seat further includes a solder paste cavity, a solder paste loading pipe, a solder paste pressing rod, and a solder paste cavity gland. The solder paste loading pipe is inserted into the solder paste cavity to contain solder paste. The solder paste pressing rod is movably inserted into the solder paste loading pipe. The solder paste cavity gland closes the solder paste cavity with the solder paste loading pipe. The device also includes a tin material cavity, a tin material loading pipe, a tin droplet pressing rod, and a tin material cavity gland. The tin material loading pipe is inserted into the tin material cavity to contain tin material. The tin droplet pressing rod is movably inserted into the tin material loading pipe. The tin material cavity gland closes the tin material cavity with the tin material loading pipe. The device solves the technical problem of inconvenient ball grid array packaging process in the prior art. However, the device uses a tin droplet pressing rod to manufacture tin balls one by one, which is slow and prone to oxidation due to direct contact with air. Therefore, there is still a need for a die casting mold for tin ball preparation. SUMMARY

[0004] TECHNICAL SOLUTION

[0005] To solve the above problems, the present application provides the following technical solution: a die casting mold for tin ball preparation, comprising an upper mold and a lower mold matched with the upper mold.

[0006] The upper mold comprises a press block that can move up and down. A plurality of support rods are connected to the lower part of the press block. A feed plug is connected to the lower part of the support rods. A feed hole is formed in the feed plug. The feed plug is embedded in the center of the upper die casting module.

[0007] The lower mold comprises a mold base plate, a lower pressure casting module is arranged at the center of the mold base plate, the feed plug is also fitted at the center of the lower pressure casting module, and a feed port is formed at the bottom center of the mold base plate, which is in communication with the feed channel of the feed plug, so that the raw material liquid flows through the feed port and the feed channel into the upper pressure casting module and the lower pressure casting module.

[0008] As a further description of the above technical solution, the shape and size of the upper pressure casting module and the lower pressure casting module are the same, and the two are arranged opposite to each other, wherein the upper pressure casting module comprises a transverse feed path in communication with the feed channel of the feed plug, and the transverse feed path is in communication with a longitudinal feed path, and a tin ball mold is formed on both sides of each longitudinal feed path, and the tin ball mold is in communication with the longitudinal feed path through a feed opening.

[0009] As a further description of the above technical solution, a plurality of upper ejectors are installed below the pressure block, the tail end of the ejector penetrates through the upper mold and extends into the tin ball mold of the upper pressure casting module, for assisting the tin ball after forming to separate from the upper pressure casting module.

[0010] As a further description of the above technical solution, a plurality of vertically placed lower ejectors are installed on the mold base plate, the lower ejector extends into the tin ball mold of the lower pressure casting module, for assisting the tin ball after forming to separate from the lower pressure casting module.

[0011] As a further description of the above technical solution, two openings are formed opposite to each other on the tin ball mold, and the upper ejector and the lower ejector are respectively inserted into the openings.

[0012] As a further description of the above technical solution, the feed plug comprises a lower feed pipe and a plug component embedded in the feed pipe, the plug component is conical, and two feed channels are formed along the edge of the plug component.

[0013] As a further description of the above technical solution, a heating channel one is formed at the bottom of the feed pipe, and a heating channel two is formed at the top end of the plug component, by injecting hot fluid into the heating channel one and the heating channel two, for heating the raw material.

[0014] As a further description of the above technical solution, a plurality of positioning guide columns are arranged at the edge of the pressure block, and the positioning guide columns are matched with the positioning holes formed at the edge of the mold base plate.

[0015] As a further description of the above technical scheme, the upper die casting module and the lower die casting module are internally provided with a plurality of heating flow channels three that are in communication with each other, and the inlets and outlets of the heating flow channels three are arranged at the frame of the die casting mold

[0016] Advantages

[0017] Compared with the prior art, the present application provides a die casting mold for tin ball preparation, which has the following advantages:

[0018] 1. The present application can directly die cast tin ball products through the pressing block, lower die casting module, upper die casting module, and the feeding path in the die casting mold and tin ball mold. At the same time, the entire upper die casting module has no gap during die casting cooperation, which can effectively reduce the oxidation of tin balls during die casting.

[0019] 2. The present application can extend the upper ejector pin and the lower ejector pin into the tin ball mold. After the tin ball is die cast, the tin ball can be ejected by the upper ejector pin to separate it from the upper die casting module, and the tin ball can be ejected by the lower ejector pin to separate it from the lower die casting module, thereby accelerating the separation of the tin ball and improving the efficiency of the tin ball demolding. DETAILED DESCRIPTION

[0020] Figure 1 is a perspective view of the present application;

[0021] Figure 2 is a partial schematic view of the present application;

[0022] Figure 3 is a partial schematic view of the present application;

[0023] Figure 4 is a schematic view of the lower mold and the upper ejector pin of the present application;

[0024] Figure 5 is a schematic view of the lower mold and the feeding plug of the present application;

[0025] Figure 6 is a top view of the lower mold of the present application;

[0026] Figure 7 is a perspective view of the upper die casting module of the present application;

[0027] Figure 8 is a perspective view of the feeding plug of the present application;

[0028] Figure 9 is a top view of the feeding plug of the present application;

[0029] Figure 10 is a B-B sectional view of the present application Figure 9 .

[0030] In the figure: 1, upper mold; 101, pressing block; 102, feeding plug; 1021, feeding pipe; 1022, plug part; 103, feeding hole; 104, upper die casting module; 2, lower mold; 201, mold base plate; 202, lower die casting module; 4, feeding port; 5, feeding channel; 6, transverse feeding path; 7, longitudinal feeding path; 8, tin ball mold; 9, feeding opening; 10, upper pin; 11, lower pin; 12, heating runner one; 13, heating runner two; 14, heating runner three; 15, guide column; 16, positioning hole. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] Embodiment one:

[0033] Please refer to Figure 1 - Figure 10 A die casting mold for tin ball preparation includes an upper mold 1 and a lower mold 2 matched with the upper mold 1. The entire mold is roughly in a square structure. A connecting hole connected with a motion mechanism such as a hydraulic cylinder is arranged at the top of the upper mold 1. When die casting is performed, the upper mold 1 is driven downward by the motion mechanism to combine with the lower mold 2 to form a space for die casting tin balls.

[0034] The upper mold 1 includes a pressing block 101 that can move up and down. The movement of the pressing block 101 is mainly driven by the above-mentioned motion mechanism. A plurality of support rods are connected to the lower part of the pressing block 101. The ends of the support rods are connected to the upper end of a feeding plug 102. A feeding hole 103 is arranged on the outer circumference of the feeding plug 102. The feeding plug 102 is embedded in the center of an upper die casting module 104 and also embedded in the center of a lower die casting module 202. The feeding hole 103 of the feeding plug 102 is connected with the feeding paths of the upper die casting module 104 and the lower die casting module 202.

[0035] The lower mold 2 comprises a mold base plate 201, and a lower pressure casting module 202 is arranged at the center of the mold base plate 201. Specifically, the lower pressure casting module 202 is embedded at the center of the lower mold 2, and the upper surface of the lower pressure casting module 202 is flush with the upper surface of the lower mold 2. The feed plug 102 is also embedded at the center of the lower pressure casting module 202, and a feed port 4 is arranged at the bottom center of the mold base plate 201. The feed port 4 is in communication with the feed channel 5 of the feed plug 102, so that the raw material liquid flows through the feed port 4 and the feed channel 5 into the upper pressure casting module 104 and the lower pressure casting module 202 for direct pressure casting molding, which is convenient and fast, and the tin balls can be directly obtained.

[0036] Embodiment two:

[0037] Reference Figure 5 - Figure 7 The upper pressure casting module 104 and the lower pressure casting module 202 are the same in size and shape, so they can be perfectly matched when they are combined into a whole. The horizontal feed path 6 and the vertical feed path 7 are arranged in the upper pressure casting module 104 and the lower pressure casting module 202. In this embodiment, the horizontal feed path 6 is arranged in the middle of the pressure casting module, and the vertical feed path 7 intersects the horizontal feed path 6. Both the horizontal feed path 6 and the vertical feed path 7 are groove structures. The length of the horizontal feed path 6 is slightly smaller than the width of the pressure casting module, and the length of the vertical feed path 7 is slightly smaller than the length of the pressure casting module. The feed pipe 1021 of the feed plug 102 penetrates the middle of the horizontal feed path 6 of the lower pressure casting module 202, and the plug part of the feed plug 102 penetrates and is fixed in the middle of the upper pressure casting module 104. The plug part is clamped and sleeved in the inside of the feed pipe 1021, and they constitute the whole feed plug 102. When the upper pressure casting module 104 and the lower pressure casting module 202 are combined into a whole, the horizontal feed path 6 and the vertical feed path 7 of the two constitute the flow channel. At this time, the flow channel constituted by the horizontal feed path 6 is in communication with the feed hole 103 of the feed plug 102, so that the raw material of the tin ball can smoothly flow into the upper pressure casting module 104 and the lower pressure casting module 202. A plurality of tin ball molds 8 are uniformly distributed on both sides of the vertical feed path 7. The tin ball mold 8 is a semicircular mold. When the upper pressure casting module 104 and the lower pressure casting module 202 are combined into a whole, a spherical cavity can be formed. In this embodiment, the vertical feed path 7 of the upper pressure casting module 104 is in communication with the tin ball mold 8 through the feed opening 9, so that the raw material of the tin ball can directly enter the tin ball mold 8 from the vertical feed path 7, realizing the molding of the tin ball.

[0038] Embodiment three:

[0039] Reference Figure 4 and Figure 6A plurality of upper ejector pins 10 are installed below the briquetting 101, the tail end of the ejector pin penetrates the upper mold 1 and extends into the solder ball mold 8 of the upper die casting module 104, a plurality of vertically placed lower ejector pins 11 are installed on the mold base plate 201, the lower ejector pin 11 extends into the solder ball mold 8 of the lower die casting module 202, which is used to assist the solder ball to separate from the lower die casting after forming, an opening is provided on the upper die casting module 104, and an opening is also provided in the lower die casting module 202, the positions of the two openings are opposite, the upper ejector pin 10 extends into the opening, and the lower ejector pin 11 extends into the lower opening, after the solder ball casting is successful, the upper die casting module 104 and the lower die casting module 202 are separated, the solder ball is ejected from the solder ball mold 8 of the upper die casting module 104 through the upper ejector pin 10, and the solder ball is ejected from the solder ball mold 8 of the lower die casting module 202 through the lower ejector pin 11, thereby assisting the solder ball to separate from the solder ball mold 8, and improving the efficiency of the solder ball demolding.

[0040] Embodiment three:

[0041] Reference Figure 8 - Figure 10 The feeding plug 102 is specifically described, the feeding plug 102 includes a lower feeding pipe 1021 and a plug part 1022 embedded in the feeding pipe 1021, the plug part 1022 is conical, two feeding channels 5 are provided along the edge of the plug part 1022, wherein the feeding pipe 1021 of the feeding plug 102 is embedded in the lower die casting module 202, and the plug part 1022 of the feeding plug 102 is embedded in the upper die casting module 104, and since the plug part 1022 is conical, there is a gap below when it cooperates with the feeding pipe 1021, so that the solder ball raw material can enter the feeding channel 5 at the edge of the plug part 1022 along the gap, thereby entering the die casting module to realize feeding, and the cooperation of the upper die casting module 104, the lower die casting module 202 and the feeding plug 102 has no gap except the related structures of the feeding channel 5, the feeding path and the solder ball mold 8, thereby ensuring to reduce the interference of oxidation during the solder ball die casting.

[0042] Embodiment four:

[0043] Reference Figure 7 - Figure 10The bottom of the feeding pipe 1021 is provided with a heating flow channel one 12, the top end of the plug component 1022 is provided with a heating channel two, by injecting hot fluid into the heating channel one and the heating channel two, the raw materials are heated, the inside of the upper die casting module 104 and the lower die casting module 202 are both provided with a plurality of heating flow channels three 14 which are communicated with each other, and the inlet and outlet of the heating flow channels three 14 are arranged at the frame of the die casting mold, in the process of tin ball die casting, by injecting heating medium into the heating flow channel one 12, the heating flow channel two 13 and the heating flow channel three 14, the tin ball raw materials are heated, the raw materials are prevented from cooling and causing blockage in the process of feeding. A plurality of positioning guide columns 15 are arranged at the edge of the block 101, the positioning guide columns 15 are matched with the positioning holes 16 arranged at the edge of the mold base plate 201, the positioning and guiding can be realized, and the upper die casting module 104 and the lower die casting module 202 can be accurately matched.

[0044] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die-casting mold for preparing solder balls, characterized in that: The upper mold and a lower mold matched with the upper mold; The upper mold comprises a movable pressing block, a plurality of supporting rods connected to the lower part of the pressing block, and a feeding plug connected to the lower part of the supporting rods, wherein a feeding hole is formed on the feeding plug, and the feeding plug is embedded in the center of the upper die casting module; The lower mold comprises a mold base plate, a lower die casting module arranged in the center of the mold base plate, and a feeding port formed in the bottom center of the mold base plate and connected to the feeding channel of the feeding plug, so that the raw material liquid flows through the feeding port and the feeding channel into the upper and lower die casting modules; The feeding plug comprises a lower feeding pipe and a plug component embedded in the feeding pipe, wherein the plug component is conical, and two feeding channels are formed along the edge of the plug component; The bottom of the feeding pipe is provided with a heating channel one, and the top end of the plug component is provided with a heating channel two, which are used for heating the raw material by injecting hot fluid into the heating channel one and the heating channel two; The upper and lower die casting modules are provided with a plurality of heating channels three connected to each other, and the inlet and outlet of the heating channels three are arranged at the frame of the die casting mold.

2. The die casting mold for tin ball preparation according to claim 1, characterized by: The upper and lower die casting modules are arranged opposite to each other, and the upper die casting module comprises a transverse feeding path connected to the feeding channel of the feeding plug, the transverse feeding path is connected to a longitudinal feeding path, and a tin ball mold is arranged on both sides of each longitudinal feeding path.

3. The die casting mold for tin ball preparation according to claim 2, characterized by: A plurality of upper ejector pins are arranged below the pressing block, the tail end of the ejector pin penetrates the upper mold and extends into the tin ball mold of the upper die casting module, which is used for assisting the tin ball after forming to separate from the upper die casting module.

4. The die casting mold for tin ball preparation according to claim 3, characterized by: A plurality of vertical lower ejector pins are arranged on the mold base plate, the lower ejector pins extend into the tin ball mold of the lower die casting module, which is used for assisting the tin ball after forming to separate from the lower die casting module.

5. The die casting mold for tin ball preparation according to claim 4, characterized by: Two opposite openings are formed on the tin ball mold, and the upper ejector pin and the lower ejector pin are respectively inserted into the openings.

6. The die casting mold for tin ball preparation according to claim 1, characterized by: A plurality of positioning guide columns are arranged at the edge of the pressing block, and the positioning guide columns are matched with the positioning holes formed at the edge of the mold base plate.

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