U.S. patent application number 16/188723 was filed with the patent office on 2019-05-30 for water-cooled mold for casting aluminum alloy wheel.
This patent application is currently assigned to CITIC Dicastal CO., LTD. The applicant listed for this patent is CITIC Dicastal CO., LTD. Invention is credited to Changhai LI, Zhen LI, Shan MA, Peng ZHOU, Yule ZHOU, Lin ZHU.
Application Number | 20190160523 16/188723 |
Document ID | / |
Family ID | 61776011 |
Filed Date | 2019-05-30 |
United States Patent
Application |
20190160523 |
Kind Code |
A1 |
ZHOU; Yule ; et al. |
May 30, 2019 |
WATER-COOLED MOLD FOR CASTING ALUMINUM ALLOY WHEEL
Abstract
The present application provides a water-cooled mold for casting
an aluminum alloy wheel, which is composed of a top mold, a side
mold and a bottom mold, wherein a side mold insert is included
between the side mold and the bottom mold, the inner surface of the
side mold insert faces a cavity, and the upper surface and the
lower surface are matched with the side mold frame respectively;
the side mold insert is made of copper; the matching surface
between the side mold insert and the side mold has a contact
matching surface having a length of 10-15 mm at the edges of the
inner ring and the outer ring respectively. And the side mold
insert and the side mold form a gap which is 0.05-0.20 mm between
the contact matching surfaces.
Inventors: |
ZHOU; Yule; (Qinhuangdao,
CN) ; LI; Zhen; (Qinhuangdao, CN) ; ZHU;
Lin; (Qinhuangdao, CN) ; ZHOU; Peng;
(Qinhuangdao, CN) ; MA; Shan; (Qinhuangdao,
CN) ; LI; Changhai; (Qinhuangdao, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
CITIC Dicastal CO., LTD |
Qinhuangdao |
|
CN |
|
|
Assignee: |
CITIC Dicastal CO., LTD
Qinhuangdao
CN
|
Family ID: |
61776011 |
Appl. No.: |
16/188723 |
Filed: |
November 13, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B22D 18/04 20130101;
B22D 11/055 20130101; B22C 9/28 20130101; B22C 9/065 20130101 |
International
Class: |
B22C 9/06 20060101
B22C009/06; B22C 9/28 20060101 B22C009/28; B22D 18/04 20060101
B22D018/04 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 30, 2017 |
CN |
2017112356576 |
Claims
1. A water-cooled mold for casting an aluminum alloy wheel,
comprising a top mold, a side mold and a bottom mold, wherein a
side mold insert is arranged between the side mold and the bottom
mold, the inner surface of the side mold insert faces a cavity, and
the upper surface and the lower surface are matched with the side
mold frame respectively; the side mold insert is made of copper;
the matching surface between the side mold insert and the side mold
has a contact matching surface having a length of 10-15 mm at the
edges of the inner ring and the outer ring respectively, and a gap
of 0.05-0.20 mm is formed between the side mold insert and the side
mold.
2. The water-cooled mold according to claim 1, wherein the matching
surface between the side mold insert and the side mold has a
contact matching surface having a length of 12 mm at the edges of
the inner ring and the outer ring of the matching surface
respectively, and a gap of 0.10 mm is formed between the side mold
insert and the side mold, and the gap is formed also between the
contact matching surfaces.
3. The water-cooled mold according to claim 1, wherein in the
water-cooled mold, a cooling water channel of the bottom mold is
located on the outer side of the bottom mold.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority to Chinese Patent
Application No. 201711235657.6, filed on Nov. 30, 2017, which is
hereby incorporated by reference in its entirety.
TECHNICAL FIELD
[0002] The present application relates to a low-pressure casting
mold for an aluminum wheel, specifically to a water-cooled side
mold and a water-cooled bottom mold for improving the shrinkage
porosity at spoke roots.
BACKGROUND ART
[0003] In the production process of low-pressure casting of
aluminum wheels, spoke roots are very obvious hot spots where the
shrinkage porosity and shrinkage cavity defect easily occurs.
Therefore, whether the mold design and the artificially added
cooling are reasonable will greatly affect the shrinkage porosity
at the spoke roots, especially the shrinkage porosity of the spoke
roots produced fast is a non-negligible defect. However, the
present common design cannot thoroughly and effectively solve the
shrinkage porosity at the spoke roots, which brings great
difficulty to speeding up the production.
[0004] FIG. 1 shows the present common cooling design of spoke
roots, the side mold insert 1 provided with a water channel is made
of ordinary mold steel, which causes low thermal conductivity and
slow cooling of the spoke roots. Although a cooling water channel 2
is arranged in the bottom mold to assist in cooling the spoke
roots, the cooling water channel 2 often affects the feeding of
spokes to the spoke roots; thus arranging cooling water channel in
the bottom mold brings more adverse effects. Of course, the
shrinkage porosity at the spoke roots can be fed by prolonging the
production cycle, adding insulation to the spokes and other
measures at the expense of production efficiency.
SUMMARY OF THE INVENTION
[0005] Accordingly, the purpose of the present application is to
provide a water-cooled mold for casting an aluminum alloy wheel,
thereby overcoming the above problems.
[0006] In one aspect, the present application provides a
water-cooled mold for casting an aluminum alloy wheel. The
water-cooled mold assembly is composed of a top mold, a side mold
and a bottom mold, and wherein a side mold insert is arranged
between the side mold and the bottom mold, the inner surface of the
side mold insert faces a cavity, and the upper surface and the
lower surface of the side mold insert are matched with the side
mold and the bottom mold respectively; the side mold insert is made
of copper; the matching surface between the side mold insert and
the side mold has a contact matching surface having a length of
10-15 mm at the edges of the inner ring and the outer ring of the
matching surface respectively. And the side mold insert and the
side mold form a gap which is 0.05-0.20 mm, and it is formed also
between the contact matching surfaces.
[0007] In a preferred aspect of the present application, the
matching surface between the side mold insert and the side mold is
a contact matching surface having a length of 12 mm at the edges of
the inner ring and the outer ring of wheel respectively, and a gap
of 0.10 mm is formed between the side mold insert and the side
mold.
[0008] In a preferred aspect of the present application, in the
water-cooled mold, a cooling water channel of the bottom mold is
located on the outer side of the bottom mold.
[0009] The advantage of the technical solution in the present
application is that by the above measures, the cooling on spoke
roots is effectively improved and the influence of the cooling
water channel on spokes is limited.
BRIEF DESCRIPTION OF DRAWINGS
[0010] The embodiments of the present invention will be described
in detail below in combination with the accompanying drawings, in
which:
[0011] FIG. 1 is a schematic diagram of a side mold insert for
spoke roots in the prior art;
[0012] FIG. 2 is a schematic diagram of a side mold insert for
spoke roots according to the present application;
[0013] FIG. 3 is a schematic diagram of a matching surface of the
side mold insert and a side mold according to the present
application.
[0014] In figures: 1--side mold insert, 2--bottom mold cooling
water channel, A--upper surface of the side mold insert, B--lower
surface of the side mold insert.
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1
[0015] A water-cooled mold for casting an aluminum alloy wheel is
composed of a top mold, a side mold and a bottom mold, and a side
mold insert is arranged between the side mold and the bottom mold,
the inner surface of the side mold insert faces a cavity, the side
mold insert upper surface A is matched with the lower surface of
the side mold, and the side mold insert lower surface B is matched
with the upper surface of the bottom mold; the side mold insert is
made of copper; the matching surface between the side mold insert
and the side mold has a contact matching surface having a length
L.sub.1 at the edges of the inner ring and the outer ring of the
matching surface respectively. And a gap L.sub.2 is formed between
the side mold insert and the side mold. The gap is formed also
between the contact matching surfaces.
[0016] In this embodiment, the following implementation scheme is
adopted for test, and the test settings are recorded in Table
1:
TABLE-US-00001 TABLE 1 Parameters of each group of test device in
this embodiment Group No. L.sub.1/mm L.sub.2/mm Test group 1 10
0.05 Test group 2 12 0.10 Test group 3 15 0.20 Control The side
mold insert is made of mold steel and the entire group 1 matching
surface is fully fitted Control The side mold insert is made of red
copper and the entire group 2 matching surface is fully fitted.
[0017] The above five groups of water-cooled molds are used to
produce five groups of hubs in the internal research and
development workshop of CITIC Dicastal Co., Ltd., 1200 hubs
constituting each group. In addition, the test results of the five
test groups are measured by hub disqualification caused by the
shrinkage porosity defect at spoke roots. The results show that the
test group 2 has the best hub production quality, and the
unqualified hubs caused by the shrinkage porosity defect at the
spoke roots include 12 cases in test group 2, 37 cases in test
group 1, 42 cases in test group 3, 81 cases in control group 1 and
54 cases in control group 2.
[0018] Hence, the mold of test group 2 reduces the ratio of the
unqualified hubs caused by the shrinkage porosity defect at the
spoke roots.
[0019] The foregoing descriptions of specific exemplary embodiments
of the present application have been presented for purposes of
illustration and description. They are not intended to be
exhaustive or to limit the invention to the precise forms
disclosed, and obviously many modifications and variations are
possible in light of the above teachings. The exemplary embodiments
were chosen and described in order to explain certain principles of
the invention and their practical application, to thereby enable
others skilled in the art to make and utilize various exemplary
embodiments of the present invention, as well as various
alternatives and modifications thereof. It is intended that the
scope of the invention be defined by the Claims appended hereto and
their equivalents.
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