U.S. patent application number 15/609410 was filed with the patent office on 2018-09-20 for cooling device for side mold of cast wheel mold.
The applicant listed for this patent is CITIC Dicastal CO.,LTD.. Invention is credited to Changhai Li, Kaiqing Wang, Yongwang Zhao.
Application Number | 20180264541 15/609410 |
Document ID | / |
Family ID | 58886875 |
Filed Date | 2018-09-20 |
United States Patent
Application |
20180264541 |
Kind Code |
A1 |
Wang; Kaiqing ; et
al. |
September 20, 2018 |
COOLING DEVICE FOR SIDE MOLD OF CAST WHEEL MOLD
Abstract
Disclosed is an improved side mold cooling device for a cast
wheel mold. The back cavity of a side mold is provided with one to
three air holes, red copper is casted in the air holes, a groove
body corresponding to a window is provided in the back cavity of
the side mold, a main air pipe is annular and concentric with the
outer diameter of a wheel, and two ends of the main air pipe are
sealed by plug welding; an air pipe connector is welded on the
outer side of the main air pipe, and the air pipe connector is
connected with an external compressed air storage device; air claws
are welded on the inner side of the main air pipe, correspond to
hot spots of spokes and are as many as the air holes in the back
cavity of the side mold.
Inventors: |
Wang; Kaiqing; (Qinhuangdao,
CN) ; Li; Changhai; (Qinhuangdao, CN) ; Zhao;
Yongwang; (Qinhuangdao, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
CITIC Dicastal CO.,LTD. |
Qinhuangdao |
|
CN |
|
|
Family ID: |
58886875 |
Appl. No.: |
15/609410 |
Filed: |
May 31, 2017 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B22C 9/28 20130101; B22C
9/065 20130101 |
International
Class: |
B22C 9/06 20060101
B22C009/06; B22C 9/28 20060101 B22C009/28 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 19, 2017 |
CN |
201710163272.7 |
Claims
1. An improved cooling device for a side mold of a cast wheel mold,
comprising an air pipe system and red copper, wherein air holes are
provided at the positions in the back cavity of a side mold
corresponding to spokes, the red copper is casted in the air holes,
and a groove body corresponding to a window is provided in the back
cavity of the side mold.
2. The improved cooling device for a side mold of a cast wheel mold
according to claim 1, wherein the roots of the air holes are spaced
8-10 mm from a cavity surface, the quantity of the air holes is 1
to 3, the thickness of the red copper casted in the air holes is
5-8 mm, and the root of the groove body is spaced 8-10 mm from the
cavity surface.
3. The improved cooling device for a side mold of a cast wheel mold
according to claim 1, wherein the air pipe system comprises an air
pipe connector, a main air pipe, air claws and air outlets; the
main air pipe is annular and concentric with the outer diameter of
a wheel, and two ends of the main air pipe are sealed by plug
welding; the air pipe connector is welded on the outer side of the
main air pipe, and the air pipe connector is connected with an
external compressed air storage device; the air claws are welded on
the inner side of the main air pipe, correspond to hot spots of the
spokes and are as many as the air holes in the back cavity of the
side mold.
4. The improved cooling device for a side mold of a cast wheel mold
according to claim 2, wherein the ends of the air claws are spaced
5 mm from the end face of the red copper; the position on the main
air pipe corresponding to the groove body is provided with the air
outlets, diameters of which are 2-4 mm and intervals of which are
20-30 mm.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is filed based upon and claims priority to
Chinese Patent Application No. 201710163272.7, filed on Mar. 19,
2017, the entire contents of which are incorporated herein by
reference.
TECHNICAL FIELD
[0002] The disclosure relates to the casting field, and
specifically to a cooling device for a cast aluminum wheel
mold.
BACKGROUND
[0003] At the present stage, about 80% of aluminum alloy wheels are
produced by adopting a low-pressure cast molding process. As for a
wheel, the junctions of the spokes and the rim are thick and large,
belong to obvious casting hot spots, and are the difficulty in
present production. A large number of production practices show
that common defects occurred at the hot spots are loosening and
shrinkage, because heat is too concentrated therein, causing slow
solidification of molten aluminum, whereas at the spoke part having
a thin wall, the molten aluminum is quickly crystallized and easily
early solidified to block a molten aluminum flow channel, thereby
hindering effective feeding on the thick and large hot spots and
finally leading to molding defects.
[0004] Moreover, relatively low degree of supercooling may result
in thick and large internal grains and shrunk and loose tissues at
the outer rim of the wheel, so that the mechanical properties of
the wheel are directly influenced, a failure phenomenon appears in
reliability tests, and the safety performance of the wheel is
influenced.
SUMMARY
[0005] A side mold cooling device for a wheel mold is provided,
which may capable of, among other things, overcoming the defects of
loosening and shrinkage easily occurring at thick and large hot
spots and improving the molding quality of a wheel.
[0006] In one embodiment of the disclosure, an improved cooling
device for a side mold of a cast wheel mold includes an air pipe
system and red copper. Air holes are provided at the positions in
the back cavity of a side mold corresponding to spokes, and the red
copper is casted in the air holes. A groove body corresponding to a
window is provided in the back cavity of the side mold, and the
groove body is made according to the shape of a rim.
[0007] The air pipe cooling system includes an air pipe connector,
a main air pipe, air claws and air outlets. The main air pipe is
annular and concentric with the outer diameter of a wheel, and two
ends of the main air pipe are sealed by plug welding. The air pipe
connector is welded on the outer side of the main air pipe, and the
air pipe connector is connected with a compressed air storage
device; the air claws are welded on the inner side of the main air
pipe, correspond to hot spots of the wheel and are as many as the
air holes. The air outlets are distributed uniformly at a position
corresponding to the window on the main air pipe, and the air
direction is ensured to be perpendicular to the molded surface of
the groove body.
[0008] The roots of the air holes are spaced 8-10 mm from a cavity
surface to ensure the strength of the mold. The quantity of the air
holes is 1 to 3.
[0009] The thickness of the red copper casted in the air holes is
5-8 mm. The root of the groove body is spaced 8-10 mm from the
cavity surface.
[0010] The air pipe system is fixed in the back cavity of the side
mold by welding or bolt connection, and shall be installed firmly.
When cooling starts, compressed air enters the main air pipe via
the connector, and a part of the compressed air is directly blown
to the hot spots of the spokes along the air claws and quickly
takes the heat of the mold away via the red copper, thus ensuring
quick cooling of the hot spots; the other part of the compressed
air is directly blown to the rim of the window via the air outlets,
so that the degree of supercooling is improved, grains are thinned,
and excellent mechanical properties of the rim are ensured; and in
a pressure casting cycle, the cooling generally starts from 30-50
seconds after liquid is heated and ends till the liquid is
completely solidified at the hot spots, and this process is
circulated, thus ensuring stable and continuous production of wheel
castings.
[0011] The disclosure ensures effective cooling of hot spots, gives
consideration to crystal forming at the outer rim, strengthens the
heat dissipation capability of the mold, quickly takes concentrated
heat, improves the solidification speed of molten aluminum,
eliminates loosening and shrinkage of hot spots, simultaneously
improves the degree of supercooling, thins grain structures,
improves the mechanical properties of the outer rim of the wheel,
obviously shortens the casting production cycle, improves the
production efficiency and reduces the production cost.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 is a schematic assembly diagram of an improved side
mold cooling device for a cast wheel mold in the disclosure.
[0013] FIG. 2 is a schematic arrangement diagram of an air pipe
system of the improved side mold cooling device for a cast wheel
mold in the disclosure.
[0014] In the figure, 1-bottom mold, 2-top mold, 3-side mold,
31-air hole, 32-groove body, 4-air pipe system, 41-air pipe
connector, 42-main air pipe, 43-air claw, 44-air outlet, 5-red
copper.
DETAILED DESCRIPTION
[0015] FIGS. 1 and 2 disclose an improved side mold cooling device
for a cast wheel mold.
[0016] Air holes 31 are provided at the positions in the back
cavity of a side mold 3 corresponding to spokes, and the roots of
the air holes 31 are spaced 8-10 mm from a cavity surface to ensure
the strength of the mold; the quantity of the air holes 31 is 1 to
3; red copper 5 is casted with a thickness of 5-8 mm in the air
holes 31 to accelerate heat dissipation of the mold. A groove body
32 corresponding to a window is provided in the back cavity of the
side mold 3, the groove body 32 is designed according to the shape
of the window, and the root of the groove body 32 is spaced 8-10 mm
from the cavity surface.
[0017] An air pipe cooling system 4 includes an air pipe connector
41, a main air pipe 42, air claws 43 and air outlets 44; the main
air pipe 42 is annular and concentric with the outer diameter of a
wheel, and two ends of the main air pipe 42 are sealed by plug
welding. The air pipe connector 41 is welded on the outer side of
the main air pipe 42, and the air pipe connector 41 is connected
with a compressed air storage device; the air claws 43 are welded
on the inner side of the main air pipe 42, correspond to hot spots
of the spokes and are as many as the air holes 31 in the back
cavity of the side mold.
[0018] The ends of the air claws 43 are spaced 5 mm from the end
face of the red copper 5; the position on the main air pipe 42
corresponding to the groove body 32 is provided with the air
outlets 44, diameters of which are 2-4 mm and intervals of which
are 20-30 mm, and the air direction is ensured to be perpendicular
to the molded surface of the cavity, thus cooling the rim.
[0019] The air pipe system 4 is fixed in the back cavity of the
side mold 3 by welding or bolt connection, and shall be installed
firmly. When cooling starts, compressed air enters the main air
pipe via the connector, and a part of the compressed air is
directly blown to the hot spots of the spokes along the air claws
and quickly takes the heat of the mold away via the red copper,
thus ensuring quick cooling of the hot spots; the other part of the
compressed air is directly blown to the rim of the window via the
air outlets, so that the degree of supercooling is improved,
internal grains are thinned, and excellent mechanical properties of
the rim are ensured; and in a pressure casting cycle, the cooling
generally starts from 30-50 seconds after liquid is heated and ends
till the liquid is completely solidified at the hot spots, and this
process is circulated, thus ensuring stable and continuous
production of wheel castings.
* * * * *