Metal working – Method of mechanical manufacture – Fluid pattern dispersing device making – e.g. – ink jet
Reexamination Certificate
1999-11-23
2001-07-03
Rosenbaum, I Cuda (Department: 3726)
Metal working
Method of mechanical manufacture
Fluid pattern dispersing device making, e.g., ink jet
C029S890100, C029S890046
Reexamination Certificate
active
06253452
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a cylindrical radiator, and more particularly to a method for manufacturing a cylindrical radiator, in which it is unnecessary to form the radiator by processing solid bar material.
A conventional radiator applied to central processing unit (CPU) of a computer includes multiple heat-radiating fins parallelly arranged around the outer periphery of the radiator in a rectangular form. A heat-radiating fan is fixedly mounted on top end of the radiator for enhancing the heat-radiating efficiency of the radiator. Such radiator with the parallelly arranged fins has a relatively large volume. Moreover, the parallelly arranged fins will intervene with the escaping airflow of the heat-radiating fan so that the heat-radiating efficiency will be reduced.
Therefore, an improved cylindrical radiator has been developed to overcome the above shortcoming. As shown in
FIG. 8
, such radiator
100
is made of a solid bar material by processing. The manufacturing method includes steps of:
(a) providing a solid bar material with a certain length;
(b) axially milling one end of the bar material to form a fan seat
101
; and
(c) using a milling tool to one by one radially mill the outer circumference of the bar material to form multiple heat-radiating fins
102
arranged about the circular center of the bar material.
In the above manufacturing procedure, some shortcomings exist as follows:
1. In the manufacturing procedure, the solid bar material is milled to produce a great amount of waste material. This causes waste of resource and increment of cost for the material.
2. The heat-radiating fins must be milled one by one. Because each radiator includes numerous heat-radiating fins, it is time-consuming and difficult to manufacture the radiator.
3. The cost for the material and the processing is very high and it is time-consuming to manufacture the radiator so that the unit price of such radiator is very high and thus the competitive ability of the product is lowered.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a method for manufacturing a cylindrical radiator, in which it is unnecessary to manufacture the cylindrical radiator with solid material so that the waste of resource is reduced and the cost for the material is lowered.
It is a further object of the present invention to provide the above manufacturing method in which the respective heat-radiating fins are formed at one time by way of drawing rather than milled one by one. Therefore, the heat-radiating fins can be formed very quickly.
It is still a further object of the present invention to provide the above manufacturing method in which the manufacturing procedure is speeded so that the manufacturing cost is effectively lowered to greatly enhance competitive ability of the product.
According to the above objects, the method for manufacturing cylindrical radiator of the present invention includes the steps of:
1. by way of drawing, manufacturing a blank material with a hollow cylindrical base section and multiple heat-radiating fins radially projecting from the outer circumference of the base section;
2. cutting the above elongated blank material into a certain length to form a blank material; and
3. from one end face of the blank material, axially turning a top portion of the hollow cylindrical base section so as to separate the top portions of the heat-radiating fins from each other to form a free end, only the bottom root portions of the heat-radiating fins integrally connecting with the bottom end of the base section.
A fan seat is fitted into a central through hole of the base section to complete the manufacturing of the cylindrical radiator.
The above manufacturing method can further includes a step of prior to fitting the fan seat into the through hole of the base section, clamping two ends of each heat-radiating fin with two cramps and twisting the two cramps relative to each other so as to bend and incline the heat-radiating fin to form a turbo cylindrical radiator.
REFERENCES:
patent: 3630062 (1971-12-01), Odaki et al.
patent: 4171634 (1979-10-01), Perkins
patent: 4437329 (1984-03-01), Geppelt et al.
patent: 4698196 (1987-10-01), Fabian
patent: 4779496 (1988-10-01), Evans et al.
patent: 4827816 (1989-05-01), Takaniemi
patent: 4942751 (1990-07-01), Fuchs, Jr.
patent: 5036693 (1991-08-01), Duffy
patent: 5092038 (1992-03-01), Geppelt et al.
Chen Hsin-Yi
Huang Hui-Chia
Cuda Rosenbaum I
Nguyen Trinh
Rosenberg , Klein & Lee
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