US20120318035A1

US20120318035A1 - Pressing-shaping method for manufacturing circular cooling base for being embedded with fins and mold used in the method

Info

Publication number: US20120318035A1
Application number: US13/163,819
Authority: US
Inventors: Shih-Ming Chen
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-20
Filing date: 2011-06-20
Publication date: 2012-12-20

Abstract

A pressing-shaping method for manufacturing a circular cooling base for being embedded with fins and a mold used in the method are disclosed. The method includes providing a blank ingot that has a first surface, a second surface, and a lateral circular surface encircling the rims of the first and second surfaces. The method further includes using a mold to press the blank ingot to cause the first surface of the blank ingot to indent inward to form a groove, and to cause a plurality of clipping grooves to be formed on the lateral circular surface of the blank ingot through extrusion. As a result, the blank ingot is shaped into the circular cooling base for being embedded with fins.

Description

BACKGROUND

1. Technical Field
The present invention relates to the manufacturing process of a heat dissipator, and more particularly, to a pressing-shaping method for manufacturing a circular cooling base for being embedded with fins and a mold used in the method.
2. Related Art
Conventionally, a heat dissipator is shaped through squeezing or pulling a piece of aluminum. Most of such conventional heat dissipators are circular in shape. Generally speaking, the piece of aluminum is first squeezed or pulled to form a long pipe with a plurality of clipping grooves on the pipe's outer wall. The pipe is then cut into a plurality of heat dissipating bases, each of which is circular and has a hollow center. Afterward, a slab is forced into a central hollow area of each of the heat dissipating bases, so that the slab can become a heat-receiving part of the heat dissipating base. The clipping groove on the exterior of the heat dissipating base is then embedded with a plurality of fins to finalize a heat dissipator.
One of the primary disadvantages of this convention method is that the spaces between the clipping grooves are relatively large. As a result, there are relatively few and sparse clipping grooves. To cope with this problem, some manufacturers will apply additional flushing-cutting process to create some additional grooves. However, this process will not only waste raw material but also wear down the cutting tools. Furthermore, some liquid solution used to facilitate the process may also pollute the manufacturing factory.

BRIEF SUMMARY

The present invention provides a pressing-shaping method for manufacturing a circular cooling base for being embedded with fins and a mold used in the method. Generally speaking, a mold is used to press a blank ingot, such as an aluminum blank ingot, to form the required circular cooling base within a single step. This can result in a faster manufacturing process and avoid additional cutting process. Furthermore, the present invention can save raw material and avoid environment pollution.
The present invention provides a pressing-shaping method for manufacturing a circular cooling base for being embedded with fins. The method includes: a) providing a blank ingot that has a first surface, a second surface, and a lateral circular surface encircling the rims of the first and second surfaces; and b) using a mold to press the blank ingot to cause the first surface of the blank ingot to indent inward to form a groove, and to cause a plurality of clipping grooves to be formed on the lateral circular surface of the blank ingot through extrusion.
The present invention further provides the mold used in the pressing-shaping method. The mold includes a male mold and a female mold. The male mold is extruded with a groove shaping part for causing the first surface of the blank ingot to form the groove. The female mold is for working in coordination with the male mold. The female mold is indented with a mold cave space. The inner wall of the mold cave space is indented with a plurality of circularly arranged teeth. The circularly arranged teeth are for causing the lateral circular surface of the blank ingot to form the clipping grooves.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a flowchart according to the pressing-shaping method of the present invention;

FIG. 2 shows the outward appearance of the blank ingot used in the present invention;

FIG. 3 shows a first schematic diagram illustrating how the mold is used to press-shape the blank ingot;

FIG. 4 shows a sectional view along the line 4-4 of FIG. 3;

FIG. 5 shows a second schematic diagram illustrating how the mold is used to press-shape the blank ingot;

FIG. 6 shows the outward appearance of the circular cooling base manufactured according to the present invention;

FIG. 7 shows a sectional view of the circular cooling base manufactured according to the present invention; and

FIG. 8 shows the outward appearance of the circular cooling base with fins further embedded thereon.

DETAILED DESCRIPTION

FIG. 1 shows an exemplary flowchart according of the present invention's pressing-shaping method for manufacturing a circular cooling base for being embedded with fins. The flowchart includes the following steps.
Please refer to FIG. 2, which illustrates step 51 of FIG. 1. In step 51, a blank ingot 1 is provided. The blank ingot 1 can be a solid column and be made up of a material that has good ductility and good heat-conductivity, such as aluminum. The blank ingot 1 has a first surface 10, a second surface 11 corresponding to another side of the first surface 10, and lateral circular surface 12 encircling the rims of the first and second surfaces 10 and 11. In this embodiment, the blank ingot 1 is an aluminum blank ingot made up of aluminum.
Please refer to FIG. 2 to FIG. 6, which illustrate step S2 of FIG. 1. In step S2, a mold 2 is used to press the aluminum blank ingot 1, causing the first surface 10 of the aluminum blank ingot 1 to indent inward to form a groove 100 and a circular thick wall 120 encircling the groove 100. The shape of the groove 100 can very according to the actual design requirements. In the meantime, the lateral circular surface 12 of the blank ingot 1 is pressed to form a plurality of clipping grooves 121. As shown in FIG. 6, the clipping grooves 121 locate on the outer surface of the circular thick wall 120. The mold 2 includes a male mold 20 and a female mold 21 for working in coordination with the male mold 20. The male mold 20 is extruded with a groove shaping part 200, which will cause the first surface 10 of the blank ingot 1 to form the groove 100. The female mold 21 is indented with a mold cave space 210 and is extruded with a plurality of circularly arranged teeth 211, which extrude inward, on the inner wall of the mold cave space 210. The teeth 211 will cause the lateral circular surface 12 of the blank ingot 1 to form the clipping grooves 121. In addition, as shown in FIG. 4 and FIG. 6, on the inner wall of the mold cave space 210, the female mold 21 of the mold 2 further has a clipping arm shaping part 212 on each of the two sides of each of the teeth 211. The clipping arm shaping parts 212 will cause the lateral circular surface 12 of the blank ingot 1 to form a plurality of separation grooves 123. As a result of step S2, a circular cooling base 1′ shown in FIG. 6 is formed.
It deserves mentioning that because the groove shaping part 200 of the male mold 20 of the mold 2 is used to press the first surface 10 of the blank ingot 1, the second surface 11 of the blank ingot 1 can remain its plane shape, as shown in FIG. 7. The second surface 11 can serve as a contacting surface between the circular cooling base 1′ and a heat source, which is not shown in the figures. Therefore, there is no need to use other process to embed any slab into the circular cooling base 1′ to serve as the contacting surface.
The aforementioned steps and mold structures serve as embodiments of the present invention's pressing-shaping method for manufacturing a circular cooling base for being embedded with fins and the present invention's mold.
As shown in FIG. 8, the resulting circular cooling base 1′ can be embedded with a plurality of fins 3 on the clipping grooves 121 and accordingly form a heat dissipator with fins. Furthermore, a circular lid 4 can be assembled to the bottom edges of the fins 3 so as to further stabilize the fins on the circular cooling base 1′.
The above description is given by way of example, and not limitation. Given the above disclosure, one skilled in the art could devise variations that are within the scope and spirit of the invention disclosed herein, including configurations ways of the recessed portions and materials and/or designs of the attaching structures. Further, the various features of the embodiments disclosed herein can be used alone, or in varying combinations with each other and are not intended to be limited to the specific combination described herein. Thus, the scope of the claims is not to be limited by the illustrated embodiments.

Claims

1. A pressing-shaping method for manufacturing a circular cooling base for being embedded with fins, the method comprising:

a) providing a blank ingot that has a first surface, a second surface, and a lateral circular surface encircling the rims of the first and second surfaces; and

b) using a mold to press the blank ingot to cause the first surface of the blank ingot to indent inward to form a groove, and to cause a plurality of clipping grooves to be formed on the lateral circular surface of the blank ingot through extrusion;

wherein after steps a) and b) the blank ingot is shaped into the circular cooling base for being embedded with fins.

2. The method of claim 1, wherein the blank ingot provided in step a) is a solid cylinder.

3. The method of claim 1, wherein the blank ingot provided in step a) is an aluminum blank ingot.

4. The method of claim 1, wherein step b) further causes the second surface of the blank ingot to form a plane.

5. The method of claim 1, further comprising:

after step b), embedding a plurality of fins onto the clipping grooves.

6. The method of claim 5, further comprising:

assembling a circular lid to the bottom edges of the fins.

7. A mold for being used in the pressing-shaping method of claim 1, the mold comprising:

a male mold, extruded with a groove shaping part for causing the first surface of the blank ingot to form the groove; and

a female mold for working in coordination with the male mold, the female mold being indented with a mold cave space, the inner wall of the mold cave space being indented with a plurality of circularly arranged teeth, the circularly arranged teeth being for causing the lateral circular surface of the blank ingot to form the clipping grooves.

8. The mold of claim 7, wherein on the inner wall of the mold cave space of the female mold, a clipping arm shaping part is formed on each of the two sides of each of the teeth.

9. The mold of claim 8, wherein the teeth and a plurality of separation teeth are formed alternately on the inner wall of the mold cave space of the female mold.

10. The mold of claim 7, wherein the teeth and a plurality of separation teeth are formed alternately on the inner wall of the mold cave space of the female mold.