JP3105902U - Press assembly structure of heat sink and pedestal - Google Patents

Abstract

Disclosed is a press-fit assembly structure for a heat radiating piece and a pedestal applied to an integrated circuit, wherein a projection formed on the pedestal is independent of the surface of the pedestal, and the heat radiating piece is inserted into a molding die to form a heat radiating piece. Pressing the protrusions on both sides deforms the protrusions moderately, and achieves a good assembling effect, without the need for solder paste application or high-temperature gap filling work, the best heat conduction and heat dissipation function To provide a press-fit assembly of a heat sink and a pedestal that simplifies the manufacturing process and shortens the required time, and at the same time achieves the purpose of environmental protection without causing pollution or harm. .
A plurality of projections are formed on a surface of the pedestal, the projections being formed on a surface of the pedestal, and the projections are radially penetrated through the projections perpendicularly to the axial direction of the projections. Is formed, the heat radiation piece is inserted into the concave structure, and the protrusions on both sides of the heat radiation piece are pressed with a molding die having teeth on the bottom surface, and the protrusion is deformed outward to release heat. The piece is fitted to the pedestal and planted on the pedestal.
[Selection] Figure 2

Description

The present invention relates to an assembling structure of a heat radiating piece and a pedestal by pressing, and in particular, is an improvement of a press fitting assembling technique applied to a radiator of an integrated circuit. Corresponding to the vertical axis direction of the projection, and forming a concave groove penetrating through the projection, press-molding and fitting the heat radiation piece on the base to obtain the best positioning and heat conduction function, The present invention relates to a press assembling structure of a heat radiating piece and a pedestal, which has a good value and an environmental protection effect.

A conventional radiator for an integrated circuit is formed of an aluminum material, adhered on the integrated circuit, and a fan is installed above the radiator, and an air flow obtained by rotation of the fan is blown on the radiator, and the integrated circuit is radiated. Is generally used. However, with the progress of the integrated circuit manufacturing process and the doubling of the operation speed, the radiator formed of the aluminum material has a low heat conduction coefficient, and thus can satisfy the need for heat radiation of today's integrated circuit. For this reason, vendors have adopted a method of bonding aluminum pieces on a copper bottom plate, utilizing the high thermal conductivity of copper, and quickly conducting the heat of the integrated circuit to the aluminum pieces, A better heat dissipation function is secured.

In the current joining technology of the aluminum piece and the bottom plate, a relatively advanced one is provided with a plurality of protrusions on the bottom plate B and uses a knife mold (not shown in the figure) to form the protrusions. A tank portion is provided at the center along the forming direction, and an aluminum piece A is further inserted into the tank portion on the protruding portion so as to correspond to the protruding portion. Is implanted above the bottom plate B (see FIG. 1). In actual production, the hardness of the copper bottom plate is so high that not only the knife mold and the pressed part C are very easily broken at the time of press molding, but also the gap between the aluminum piece A and the bottom plate B creates a heat. Normally, it is necessary to apply solder paste to the lower end of aluminum piece A or to apply solder paste to the joint between aluminum piece A and bottom plate B to prevent the problem of reduced conductivity. Through the processing and cooling, the effect that the solder enters the gap of the joint and fills the gap can be obtained, and the heat conduction effect can be enhanced.

However, the above-mentioned procedures involve different work processes such as pressing, electroplating, and soldering, so the manufacturing process is complicated and time-consuming, and especially when performing electroplating, it is harmful to the human body and pollutes the environment. The work of applying solder paste to gaps, which generates waste air and wastewater, is harmful to the human body and may cause injury to the human body because the solder paste contains high concentrations of lead and other heavy metals. The above-mentioned electroplating and soldering work is a kind of high pollution and high harm to human beings and their living environment, and is an industrial process without any environmental protection effect. In addition, upon completion of each stage of the manufacturing process, it is necessary to transport the radiator to various processing locations and perform subsequent operations. In addition, after the electroplating or soldering operation is completed, further pickling and anti-pickling are performed. Oxidation must be performed, which not only increases manufacturing costs, but also reciprocates transportation and reworking, which results in increased wear and rejects of parts and lower industrial efficiency, which was not originally high. I have. The above situation is the main reason that the price of the integrated circuit radiator sold in the market does not decrease.

The main object of the present invention is to form a plurality of protrusions on the surface of the pedestal, and to form a plurality of grooves which penetrate the protrusions in the radial direction perpendicular to the axial direction of the protrusions with a knife mold. It is still another object of the present invention to provide a press fitting assembly of a radiating piece and a pedestal, wherein the radiating piece is inserted into the concave groove and assembled by press fitting.

Another object of the present invention is that the projections are independent of the surface of the pedestal, and when the projections are inserted into the concave grooves and the projections on both sides of the projections are pressed by a molding die, the projections are formed. It has a moderate deformation allowance and can achieve good fitting and joining effects, and at the same time, obtains the best heat conduction and heat dissipation function without the need to apply solder paste and fill gaps by high temperature Simplifies the manufacturing process, shortens the required time, meets the requirements of environmental protection without causing pollution and harm, and improves the industrial efficiency and production efficiency on a time-by-hour basis. It is an object of the present invention to provide a press fitting assembly structure of a heat radiation piece and a pedestal.

It consists of assembling a pedestal and a plurality of heat radiation pieces, of which a plurality of protrusions are molded on the surface of the pedestal, and a plurality of concave grooves penetrating the protrusions in the radial direction perpendicular to the axial direction of the protrusions. Forming, inserting the heat radiating piece into the concave structure, and further pressing the protrusions on both sides of the heat radiating piece with a molding die having teeth on the bottom surface, the protrusions are deformed outward under pressure. The heat dissipating piece is fitted on the pedestal and is planted on the pedestal.

According to the present invention, the impact force in the opposite direction that the knife mold receives when the groove is opened is greatly reduced, the breakage of the knife mold is effectively prevented, the smoothness of the molding operation and the durability of the knife mold are improved. Can be improved. In addition, it is possible to obtain the best heat conduction and heat dissipation function without requiring the conventional solder paste application and gap filling work by high temperature, simplify the manufacturing process, and reduce the time required for manufacturing. At the same time, the purpose of environmental protection can be achieved without causing pollution or harm.

As shown in FIG. 2 to FIG. 4, the press fitting structure of the heat radiating piece and the pedestal according to the present invention comprises a pedestal 1 and a plurality of radiating pieces 2, of which the pedestal 1 is formed of a metal material having a high heat conductivity coefficient. A plurality of arc-shaped projections 11 are formed on the surface thereof, and a plurality of concave grooves 12 are formed by radially penetrating the slight projections 11 perpendicularly to the axial direction of the projections 11. The heat radiating pieces 2 are inserted into the concave grooves 12 correspondingly, and the protrusions 11 on both sides of the heat radiating pieces 2 are pressed by the molding die 3 having teeth on the bottom surface, and the protrusions 11 receive force and spread outward. Thus, the heat dissipating piece 2 is fitted on the pedestal 1 and implanted (see FIG. 6).

Due to the above-described features, the present invention utilizes a plurality of protrusions 11 formed on the pedestal 1 and the heat radiation pieces 2 vertically inserted into the concave grooves 12 of the protrusions 11, and the protrusion 11 is located above the pedestal 1. When the concave groove 12 is molded with the knife mold (not shown in the figure), the impact force in the opposite direction received by the knife mold is greatly reduced, preventing the knife mold from breaking. At the same time, the protrusions 11 have a moderate deformation allowance, and the heat radiation pieces 2 can be fitted and connected in the best condition to obtain good heat conduction and heat radiation effects, and at the same time, generate pollution and harm. To achieve the purpose of environmental protection.

It is a mimetic diagram showing press molding of the conventional radiator. FIG. 2 is an exploded view of the present invention. It is a front view, a side view, and a top view of the pedestal of the present invention. FIG. 4 is a schematic view showing a state in which the heat radiation piece and the bottom plate of the present invention are inserted in correspondence with each other. FIG. 4 is a schematic view showing a state in which the protrusions on both sides of the heat radiating piece are pressed by the molding die of the present invention and deformed. FIG. 3 is a three-dimensional view showing a state where the press fitting of the present invention is completed.

Explanation of reference numerals

1 pedestal
11 Projection
12 Groove
2 Heat sink
3 Mold

Claims (4)

  It consists of a pedestal and a small number of heat dissipation pieces, of which a plurality of protrusions are molded on the surface of the pedestal, and different from the axial direction of the protrusions, provided with a plurality of concave grooves penetrating the some protrusions in the radial direction. The heat radiating pieces are inserted into the concave structures corresponding to the concave structures, and the protrusions on both sides of the heat radiating pieces are pressed by a molding die having teeth on the bottom surface, and the protrusions are deformed outward by receiving pressure. At the same time, the heat dissipating piece is fitted to the pedestal and a press assembling structure of the radiating piece and the pedestal is planted on the pedestal.   The press assembling structure according to claim 1, wherein the concave groove is provided corresponding to a vertical axis direction of the projection.   The press assembling structure according to claim 1, wherein the projection is formed in a state of being projected in an arc shape. 2. The structure of claim 1, wherein said pedestal is made of a metal material having a high thermal conductivity.

Images