Tin powder solder hot press molding device

Abstract

The utility model discloses a tin powder solder hot press forming device which comprises a base frame, a workbench, a press machine and a control center, wherein the workbench, the press machine and the control center are arranged on the base frame. The workbench is provided with a first heating plate and a lower pressing die; the press machine is located above the workbench, and a second heating plate and an upper pressing die are arranged at the movable end of the press machine. The lower pressing die is provided with a tin powder discharging groove. The first heating plate and the second heating plate comprise two heating substrates which are stacked up and down, and an iron-chromium-aluminum heating film is clamped between the two heating substrates; and the iron-chromium-aluminum heating film is provided with an iron-chromium-aluminum heating wire and a temperature sensing probe which are electrically connected with the control center. According to the utility model, the first heating plate and the second heating plate are respectively arranged on the lower pressing die and the upper pressing die, so that the upper die and the lower die can be synchronously heated; the hot press molding of the tin powder is carried out on the iron-chromium-aluminum heating film at a better working temperature, and the hot press molding of the tin powder solder is realized by accurately controlling the heating temperature and the heating efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of tin powder molding and manufacturing, in particular to a tin powder solder hot pressing molding device. Background Art

[0002] Gold-tin powder solder has been widely used in hermetic packaging, chip packaging and other fields due to its excellent tensile strength, strong corrosion resistance, good fluidity and wettability.

[0003] In some applications, gold-tin powder solder needs to be processed into circular and waist-shaped rings to form seals between pins and cavity sidewall vias, or between the connector housing and the inner core. These high-precision components place high demands on the solder's shape and thickness. Conventional hot-pressing equipment is prone to cracking and even entire edge fracture during the stamping process, as gold-tin alloys are inherently brittle. Therefore, a tin powder solder hot-pressing device with precise control of heating temperature and efficiency is needed. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a tin powder solder hot pressing forming device.

[0005] An embodiment of the present invention solves the technical problem by adopting a technical solution: a tin powder solder hot pressing forming device, comprising: a base frame, and a workbench, a press and a control center arranged on the base frame;

[0006] The workbench is provided with a first heating plate and a lower die; the press is located above the workbench, and its movable end is provided with a second heating plate and an upper die; the lower die is provided with a tin powder discharge trough;

[0007] The first heating plate and the second heating plate include two heating substrates stacked one above the other, with an iron-chromium-aluminum heating film sandwiched between the two heating substrates; the iron-chromium-aluminum heating film is provided with an iron-chromium-aluminum heating wire and a temperature sensing probe electrically connected to the control center.

[0008] Optionally, the workbench is provided with positioning columns, and the first heating plate and the lower die are provided with positioning holes corresponding to the positioning columns.

[0009] Optionally, a positioning countersunk hole corresponding to the top of the positioning column is opened below the upper die.

[0010] Optionally, a plurality of groups of independent iron-chromium-aluminum heating wires are provided in the iron-chromium-aluminum heating film.

[0011] Optionally, the iron-chromium-aluminum heating film is provided with a plurality of long blank areas, and no iron-chromium-aluminum heating wires are arranged in the blank areas.

[0012] Optionally, the heating temperatures of the first heating plate and the second heating plate are set in the range of 100 to 120 degrees Celsius.

[0013] The beneficial effects of the present invention are as follows: the first heating plate and the second heating plate are respectively arranged on the lower die and the upper die, and the upper and lower dies can be heated synchronously; and the first heating plate and the second heating plate include two heating substrates stacked one above the other, and an iron-chromium-aluminum heating film is sandwiched between the two heating substrates; the iron-chromium-aluminum heating film has a large resistivity and a small resistance temperature coefficient, and can accurately control the temperature of the heating plate, thereby performing hot pressing of tin powder at an optimal working temperature, and accurately controlling the heating temperature and heating efficiency of tin powder solder hot pressing.

[0014] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 This is a schematic structural diagram of the tin powder solder hot pressing forming device of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the iron-chromium-aluminum heating film of the utility model.

[0018] Description of main component symbols:

[0019] 10. Base frame; 20. Workbench; 21. First heating plate; 22. Lower die; 23. Tin powder discharge trough; 24. Positioning column; 30. Press; 31. Second heating plate; 32. Upper die; 33. Positioning countersunk hole; 40. Control center; 50. Iron-chromium-aluminum heating film; 51. Iron-chromium-aluminum heating wire; 52. Temperature sensor; 53. Blank area. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0021] In the description of this utility model, "above," "below," and "within" are understood to be exclusive of the number indicated, while "above," "below," and "within" are understood to be inclusive of the number indicated. The use of "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, or implicitly specifying the number or order of the technical features indicated.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0023] In this utility model, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection; internal communication between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of these terms in this utility model based on the specific content of the technical solution.

[0024] Example

[0025] Reference Figure 1 and Figure 2 The utility model proposes a tin powder solder hot pressing forming device, comprising: a base frame 10, a workbench 20, a press 30 and a control center 40 arranged on the base frame 10;

[0026] The workbench 20 is provided with a first heating plate 21 and a lower die 22; the press 30 is located above the workbench 20, and its movable end is provided with a second heating plate 31 and an upper die 32; the lower die 22 is provided with a tin powder discharge trough 23;

[0027] The first heating plate 21 and the second heating plate 31 include two heating substrates stacked one above the other, with an iron-chromium-aluminum heating film 50 sandwiched between the two heating substrates; the iron-chromium-aluminum heating film 50 is provided with an iron-chromium-aluminum heating wire 51 and a temperature sensor 52 electrically connected to the control center 40.

[0028] In the present invention, the first heating plate 21 and the second heating plate 31 are respectively arranged on the lower die 22 and the upper die 32, and the upper and lower molds can be heated synchronously; and the first heating plate 21 and the second heating plate 31 include two heating substrates stacked up and down, and an iron-chromium-aluminum heating film 50 is sandwiched between the two heating substrates; the iron-chromium-aluminum heating film 50 has a large resistivity and a small resistance temperature coefficient, and can accurately control the temperature of the heating plate, so as to perform hot pressing of tin powder at a better working temperature, and accurately control the heating temperature and heating efficiency of tin powder solder hot pressing.

[0029] In this embodiment, in order to facilitate the replacement and disassembly of the first heating plate 21 and the lower die 22 , the workbench 20 is provided with positioning posts 24 , and the first heating plate 21 and the lower die 22 are provided with positioning holes corresponding to the positioning posts 24 .

[0030] Furthermore, a positioning countersunk hole 33 corresponding to the top of the positioning column 24 is provided below the upper pressing die 32. Through the positioning countersunk hole 33, the upper pressing die 32 can be aligned with the lower pressing film and pressed downward.

[0031] In this embodiment, in order to facilitate rapid adjustment of the heating efficiency of the iron-chromium-aluminum heating film, a plurality of independent iron-chromium-aluminum heating wires 51 are provided in the iron-chromium-aluminum heating film 50. By simply changing the number of energized iron-chromium-aluminum heating wires 51, the heating efficiency of the iron-chromium-aluminum heating film 50 can be changed, thereby adapting to different tin powder pressing molds for corresponding heating operations and avoiding too slow or too fast heating temperatures.

[0032] In this embodiment, the iron-chromium-aluminum heating film 50 is provided with a plurality of long blank areas, in which no iron-chromium-aluminum heating wires 51 are arranged. By providing the blank areas on the iron-chromium-aluminum heating film 50, the heating density of the iron-chromium-aluminum heating film can be reduced, the interference between the iron-chromium-aluminum heating wires 51 can be reduced, and the heat of the iron-chromium-aluminum heating wires 51 can be easily transferred to the mold.

[0033] In this embodiment, the heating temperature of the first heating plate 21 and the second heating plate 31 is set to be between 100 and 120 degrees Celsius. The range of 100 to 120 degrees Celsius is an optimal temperature for hot pressing tin powder to prevent oxidation of the tin powder. Preferably, the heating temperature is set to 110 degrees Celsius.

[0034] Of course, the present invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A tin powder solder hot pressing forming device, characterized in that: include: A base frame (10), a workbench (20), a press (30) and a control center (40) arranged on the base frame (10); The workbench (20) is provided with a first heating plate (21) and a lower die (22); the press (30) is located above the workbench (20), and a second heating plate (31) and an upper die (32) are provided at its movable end; the lower die (22) is provided with a tin powder discharge trough (23); The first heating plate (21) and the second heating plate (31) include two heating substrates stacked one above the other, with an iron-chromium-aluminum heating film (50) sandwiched between the two heating substrates; the iron-chromium-aluminum heating film (50) is provided with an iron-chromium-aluminum heating wire (51) and a temperature sensing probe (52) electrically connected to the control center (40).

2. The tin powder solder hot pressing forming device according to claim 1, characterized in that: The workbench (20) is provided with a positioning column (24), and the first heating plate (21) and the lower pressing die (22) are provided with positioning holes corresponding to the positioning column (24).

3. The tin powder solder hot pressing forming device according to claim 2, characterized in that: A positioning countersunk hole (33) corresponding to the top of the positioning column (24) is provided below the upper pressing die (32).

4. The tin powder solder hot pressing forming device according to claim 1, characterized in that: Several groups of mutually independent iron-chromium-aluminum heating wires (51) are arranged in the iron-chromium-aluminum heating film (50).

5. The tin powder solder hot pressing forming device according to claim 1, characterized in that: The iron-chromium-aluminum heating film (50) is provided with a plurality of long blank areas, wherein no iron-chromium-aluminum heating wires (51) are arranged in the blank areas.

6. The tin powder solder hot pressing forming device according to claim 1, characterized in that: The heating temperatures of the first heating plate (21) and the second heating plate (31) are set in the range of 100 to 120 degrees Celsius.

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