Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Reexamination Certificate
1999-05-14
2001-05-29
Rosenbaum, I Cuda (Department: 3726)
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
C029S890043, C029S890039
Reexamination Certificate
active
06237222
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a method of producing a radiator and product thereof, and more particularly to a method for easily forming a radiator at lowered production cost and product thereof.
A conventional radiator is usually integrally formed from extruded aluminum and requires considerably high production cost. Meanwhile, the aluminum material has high regeneration performance and is therefore not an absolutely good material for superior heat radiation and temperature drop. To improve drawbacks existing in the conventional extruded aluminum radiator, there is built-up radiator developed. Taiwanese Patent Publication No. 339865 entitled “A Radiator” discloses a built-up radiator including a base
1
, a radiating main body
2
, and a top cover
3
. Assembled and exploded perspective views of the radiator are shown in
FIGS. 11 and 12
, respectively. The base
1
is a thin plate made of aluminum and has upward extended front and rear edges
11
both that are provided with two retaining notches
111
. The radiating main body
2
is formed by continuously bending a plurality of aluminum sheets, so that each of the aluminum sheets includes a plurality of hollow grids
21
. The grids
21
located at two outer ends of each bent aluminum sheet have an outward extended leg
211
each. The top cover
3
is made of aluminum sheet and has an n-shaped cross section. Front and rear vertical walls of the top cover
3
are provided at their surfaces with two openings
31
corresponding to the notches
111
on the base
1
, and at their lower edges with an inward bent lip
32
each. The top cover
3
is also provided at a top surface thereof with a central window
33
. Four through holes
331
are separately provided on the top surface of the top cover
3
near four corners of the window
33
. The radiating main body
2
is welded or glued to an upper surface of the base
1
with an adequate clearance left between the legs
211
and the upward front and rear edges
11
of the base
1
. The top cover
3
is located above the radiating main body
2
to house the same. The lips
32
at the lower edges of the top cover
3
are located below the legs
211
of the radiating main body
2
, and the lower edges of the top cover
3
are prevented from moving by the upward front and rear edges
11
of the base
1
.
Following are some disadvantages existing in the above-described conventional built-up radiator:
1. The radiating main body
2
must be attached to the base
1
before the top cover
3
can be covered onto the radiating main body
2
. It necessitates an increased clearance left between the legs
211
and the edges
11
to allow easy assembling of the top cover
3
to house the radiating main body
2
. The increased clearance will, however, cause easily loosened or even separated top cover
3
from the whole radiator.
2. It is uneasy and therefore takes considerable time to mount the top cover
3
onto the base
1
for housing the radiating main body
2
. Cost for the conventional built-up radiator is therefore high.
3. The base
1
, the radiating main body
2
and the top cover
3
all have complicate structure. The upward front and rear edges
11
and the retaining notches
111
of the base
1
and the bent hollow grids
21
and the legs
211
of the radiating main body
2
all are difficult to form. The conventional built-up radiator therefore requires high manufacturing cost while the productivity thereof is low.
4. The top cover
3
is provided mainly for mounting a cooling fan thereto and is not made of thermal conductive material. It does not radiating heat and is therefore a superfluous member in the radiator.
5. The top cover
3
makes the radiator bulky and heavy.
It is therefore tried by the inventor to simplify the manufacturing process for the conventional built-up radiator and develop a method for easily forming a built-up radiator at reduced production cost.
SUMMARY OF THE INVENTION
A primary object of the present invention is to provide a method for producing a radiator that can be quickly assembled to reduce production cost thereof.
Another object of the present invention is to provide a radiator that has simple structure and reduced weight and can be easily assembled to increase productivity.
The method of producing a radiator according to the present invention includes the steps of forming a base, forming a radiator fin, associating the radiator fin with the base, forming a foundation plate, and assembling the foundation plate to an underside of the base.
The step of forming a base includes cutting a thermal conductive material to form a U-shaped base, punching a bottom of the base to form a plurality of parallel linear slots, and forming a flat recess below the bottom of the base.
The step of forming a radiator fin includes cutting a thermal conductive material to form a belt having a width equal to the length of the linear slot formed on the bottom of the base, and punching the belt material to form a plurality of fins.
The step of associating the radiator fin with the base includes locating the radiator fin below the base and aligning the fins with the linear slots on the base, and pushing the radiator fin upward for the fins to pass through the linear slots and project from the bottom of the base.
The step of forming a foundation plate provides a plate having dimensions suitable for setting in the bottom recess of the base.
The step of assembling the foundation plate to the base includes positioning the foundation plate below the radiator fin that has been associated with the base, and firmly setting the foundation plate in the flat recess at underside of the bottom of the base.
A radiator produced in the above method of the present invention mainly includes a base, a radiator fin, and a foundation plate.
The base has a U-shaped cross section and includes a bottom and two upward side walls. The bottom has a plurality of parallel linear slots provided thereon. The two side walls have extended lower ends slightly projected from the bottom to define a flat recess at an underside of the bottom.
The radiator fin is formed from a punched belt material and includes a plurality of fins pointed upward. The fins are spaced and have thickness and length corresponding to the parallel linear slots on the bottom of the base, so that the radiator fin may be upward associated with the base with the fins separately located in the linear slots.
The foundation plate is a flat plate adapted to firmly and fixedly set in the flat recess below the bottom of the base for supporting a bottom of the radiator fin.
REFERENCES:
patent: 4746479 (1988-05-01), Hanaki et al.
patent: 5247734 (1993-09-01), Lubbe et al.
patent: 5533257 (1996-07-01), romero et al.
patent: 6134783 (2000-10-01), Bargman et al.
patent: 6138352 (2000-10-01), Smith et al.
Cuda Rosenbaum I
Pro-Techtor Inter-national Services
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