Product Details
Clamshell Phone Back Cover (1*1)
No.21870-B
Our 400mm x 400mm x 426mm injection mold, with part number DDI3540
70100100, is designed according to LKM standards to meet your
precision manufacturing needs.The pin point gate can be converted
to a side gate for flexibility in production and customization. As
a three-plate mold with 7 slides and 2 lifters, it ensures smooth
operation and precise molding of complex designs.Weighing 418kg,
the mold is robust and durable with a tool life of 500,000 shots.
It is compatible with 110T injection molding machines, suitable for
various production requirements. |
The mold features:
① Pin point gate convertible to side gate
② Three-plate structure
③ 7 slides and 2 lifters
④ 418kg weight
⑤ 500,000 shot tool life
⑥ Compatible with 110T injection molding machines
The injection molded part is made of polycarbonide (PC) reinforced
with 10% glass fiber. This composite material provides excellent
impact performance, good toughness, excellent heat resistance to
reduce thermal deformation, less surface fiber marks, uniform
distribution of glass fibers, good paintability, and a low
defective rate of painting. The part weighs 4.8 grams and measures
55.51 x 11.20 x 107.96 millimeters. |
Surface finish: A surface EDM with VDI27# to improve the roughness, and the molded
part has a smoother surface |
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Steel of cavity & core: | Harden with S136, with good comprehensive mechanical property, high polishing performance, high hardness, anti-wearing, anti-corrosion. |
Harden (1*2/S136) |
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Injection/runner type: Cold runner
Display diagram
Company Profile

What we do:
Chitwing is focusing on providing custom-made products to
world-wide customers, including
product structure design based on customer’s ID, mold design &
fabrication, mold trial &
prototyping, MP production and shipment.
At the same time, we can offer 50~100 sets of custom-made mold and
standard component to
customers including high precision stamping tool, die-casting tool
(Zinc & Alu. Alloy) and high
precision injection mold.
Equipment we use:
Program for mold design:UG
Mold fabrication:CNC(Makino, Fanuc), EDM(Makino, Charmilles
、Agie),Wire cut(Makino,
Sodick, Agie) etc.
Injection machine:10T~550T
Press machine:40T~300T
Die-casting machine:80T~340T
Systems we have:
Quality system: ISO9001, ISO13485 (medical device), IATF16949
(automotive device)
Environmental system:ISO14001
Hazardous substance system: QC080000
Occupational health and safety management system: OHSAS18001
Products we offer:
3C electronics,Automotive electronics, home appliances , Medical
device,Battery, etc.

Company Overview:
1988 | Established |
40 | Years experience of precision molding design, manufacture and
injection molding. Honorably awarded with advanced molding enterprise certificate in
2017. |
20 | Years experience which specialized in consumer electronic molding
and products manufacture |
8000 | Employees, 200,000 square workshop. Consists of cross-national
elites (Korea/Japan/Taiwan/France) |
002855 | Listed in Shenzhen stock board on 2017/3/21 |
Hi-Tech | National high tech enterprise, Engineering tech research center in
Guangdong province, numbers of invention patents: 178 application patents, including 73 patents(authorized 25 patents), 105 utility model patents(25 effective authorized patents) |
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Best | Samsung | Comprehensive Awards, Delivery Gold/Silver Medals, CSR Environment & Safety Medal,Core Supplier Award, Excellent Quality Award, Best Strategic Partner Award, Best Partner Award |
Huawei |
TCL |
COMPAL |