Chair Moulds Solution2
-
Upload
abu-abdullah-zaki -
Category
Documents
-
view
224 -
download
0
Transcript of Chair Moulds Solution2
-
8/2/2019 Chair Moulds Solution2
1/33
-
8/2/2019 Chair Moulds Solution2
2/33
-
8/2/2019 Chair Moulds Solution2
3/33
-
8/2/2019 Chair Moulds Solution2
4/33
Sino Mould is the leading chair mould manufacturer in china.
Annually manufacturing over than 80 sets of chair moulds.
Interchangeable inserts block for different chair backrest versions.
Backrest inserts can be easily changed on the machine, we are also
familiar with PC transparent chair with gas injection, variousmonoblock chair moulds with armrest or without
-
8/2/2019 Chair Moulds Solution2
5/33
Mould running cycle time
Mould service life guarantee
Parting Line finishing
Wall thickness How to make chair moulds with less weight but strong enough
Stack ability
Air venting on the backrest
How to keep chair mould finishing long lasting.
-
8/2/2019 Chair Moulds Solution2
6/33
If the cooling water temperature is from 8 to 12 centigrade
degree, if the chair weight from 1700g to 2400g, the cycle time
should be 35s to 50s. If the machine plastic melt and injection
is with accumulators. Please check how they make the cooling
channel? If the cooling channel is extra in and out? If thecooling channel is one according with the chair shape?
-
8/2/2019 Chair Moulds Solution2
7/33
Many people will say that they will have one millions
guaranteed. But God now how can they guarantee. The
guarantee for a mould run 1 million shorts without any
flashes? Because if you accept to cut the flash by your workers
heavy labor, I think you can use this mould for 10 millionsshorts. So you need to check the steel hardness, and in the
mould if there is any parting area were welded. Normally the
steel hardness should be HRC33.
-
8/2/2019 Chair Moulds Solution2
8/33
Sharp edge on the chair is dangerous, in order to avoid the sharp edge, wehave to do many points during the mould manufacturing.
Chair mould parting design is correct or not.
The cavity and core thickness is enough or not.
How you make the CNC milling the cavity and core? One stage finishing orseveral stage finishing? Normally, we need 3 stages finishing. From rough millingto steel hardened, after hardening, take the 2nd stage milling, we call it half precisemilling, normally we leave 0.3mm, Then make the steel stress releasing, after thiswe do final precise milling. When in this time, the machining operation is veryimportant. we have to use cooling on the milling area, we have to be sure that each
cutting, the depth will not bigger then 0.08mm. All these are because of the steelwill be deformed when milling and after the hardening. The deforming will causethe cavity and cores fitting are not accurate, there will be a lot of hand works on it.By hand works on the parting area, you can never work out a perfect parting line.
-
8/2/2019 Chair Moulds Solution2
9/33
Hand working on the parting line also be one of the reason for
wall thickness is not even. Of course, most of the reason is
from the plastic chair 3D design and poor polishing on the
cavities and cores. So when we start a plastic chair design, we
have to consider the wall thickness. Sometimes, we need tomake some area a little thicker to be sure that the chair is
strong enough. But we have to consider seriously when it is
need. As because the uneven thick will caused the injection not
balanced and also will caused the cooling time not even. Thiswill effect the injection speed slow down and also will caused
the shrinkage marks. If the CNC milling is too rough, you can
never get a chair with thickness even.
-
8/2/2019 Chair Moulds Solution2
10/33
When the chair plastic design are doing, we have to check its
stackability. And you also need to consider the deform
possibility of the chair moulding.
-
8/2/2019 Chair Moulds Solution2
11/33
When starting make the plastic chair design, we have to
consider the weight and the strength. You can make the bottom
area be strong enough by add more ribs. But how about the
leg, backrest and armrest area? For this reason, you need to
calculate or analyze the force of each areain order to make alight chair strong enough, you can choose a very low MFI PP
material. But in this way, you need to make the mould very
strong and also you need to be sure the injection filling are
available, as you are using a material with MFI 4 or Max. 6.
-
8/2/2019 Chair Moulds Solution2
12/33
For some chair backrest design is very complex, there is a lot
of material jointing line, and some air can not venting out
when material filling and flowing. For this reason, you need to
analyze by mold-flow maybe, and there are a lot of area need
air venting built in the mould.
-
8/2/2019 Chair Moulds Solution2
13/33
In order to make your chair mould cavity and core will not be
rust by the plastic material, you need to be sure that the steel
are high chrome and also the hardness are bigger then HRC33.
if you will use some recycled material for injection, you need
your chair mould be hard chrome plated. Otherwise, you needto make the polishing from time to time.
-
8/2/2019 Chair Moulds Solution2
14/33
-
8/2/2019 Chair Moulds Solution2
15/33
-
8/2/2019 Chair Moulds Solution2
16/33
-
8/2/2019 Chair Moulds Solution2
17/33
-
8/2/2019 Chair Moulds Solution2
18/33
-
8/2/2019 Chair Moulds Solution2
19/33
-
8/2/2019 Chair Moulds Solution2
20/33
-
8/2/2019 Chair Moulds Solution2
21/33
-
8/2/2019 Chair Moulds Solution2
22/33
-
8/2/2019 Chair Moulds Solution2
23/33
-
8/2/2019 Chair Moulds Solution2
24/33
-
8/2/2019 Chair Moulds Solution2
25/33
-
8/2/2019 Chair Moulds Solution2
26/33
Sino Mould Co. ,Ltd
Wendy Lu :Sales Engineer
E-Mail: [email protected]
Skype: sino.holdings.group-007
Tel:+8615068622586
Sino Mould is the leading chairmould manufacturer in china, we
has developed more than 500 sets
chair moulds during these years. If
you need a high speed, long time and
nice finishing chair mould, please
come to us. We are sure you will be
satisfied.
For more plastic products moulds
information, please kindly refer to
our website:
www.cnmould.com
And Sino People always warmlywelcome your visit to review our
factory.
Looking forward to start our long
term business cooperation now!!
mailto:[email protected]:[email protected]:[email protected]://MSN:[email protected]/http://www.cnmould.com/http://www.cnmould.com/http://MSN:[email protected]/mailto:[email protected]:[email protected]:[email protected]:[email protected]:[email protected] -
8/2/2019 Chair Moulds Solution2
27/33
-
8/2/2019 Chair Moulds Solution2
28/33
-
8/2/2019 Chair Moulds Solution2
29/33
-
8/2/2019 Chair Moulds Solution2
30/33
-
8/2/2019 Chair Moulds Solution2
31/33
-
8/2/2019 Chair Moulds Solution2
32/33
-
8/2/2019 Chair Moulds Solution2
33/33
DAKUMAR Machinery is one of our Sino Holdings Groupbranch company, which is one of the Chinese leadinginnovator for plastic injection molding machine researchingand developing.
DAKUMAR has established service center in Brazil, Mexico,South Africa, Turkey, Israel, Russia...in order to make betterservice, we are negotiating with many oversea professionalteam to establish more and more service centers andpartnership in different countries
For more information, please kindly visit our website orcontact with me.
Welcome your down visiting !!!!!!!!!!