Precision Electronics_Shenzhen ZhenXiong Hot Runner Technology co. LTD

Application case

◆ Injection material: PBT+30%GF

Injection way: valve nozzle

Customers: Dell, HP, SONY, Toshiba, Lenovo, etc

◆ Zhenxiong hot runner advantages:

1. add high glass fiber nozzle system and complete hot runner system without gate,
which can be customized according to customer requirements.

2. long-term production without burr, gate whitening problem, more beautiful gate;

3. multi-cavity hot runner has good balance and stable product size.

The hot runner system is designed according to the service life of 1 million molds,
and the injection molding production is stable.

》Mobile phone charger shell application case

◆ Injection material :PC

◆ Injection method:valve gate or pin-point gate

◆ Customers: Apple, Samsung, Huawei, Xiaomi, etc

◆ Zhenxiong hot runner advantages:

★ special nozzle for charger socket, complete hot runner system without gate,
nozzle cavity is 10mm.

★ PC white without yellowing and wire-drawing, beautiful gate and stable quality;

★ multi-cavity hot runner has good balance and stable product size.

The hot runner system is designed according to the service life of 1 million
molds, and the injection molding production is stable.

Solution

》Reasons for system leakage.
  ■ Zhenxiong manifold is inserts and polished by the runner polishing machine
Along with Hot fit application (interference fit) without leakage .

Leakage of nozzle sealing
  ■ Zhenxiong has strict testing training and requirements for all the installation
personnel. Only when all the dimensions are processed accurately according
to the drawings can they be installed to ensure no leakage.

Nozzle and manifold matching surface leakage.
  ■ zhenxiong design has avoided possible machining errors, as shown in the
right figure
  ■ Zhenxiong focuses on engineering materials and high glass fiber products
Imported steel, specially treated, more wear - resistant and corrosion - resistant
  ■ Zhenxiong nozzles are made of imported steel with special treatment,
effectively ensuring the life of products. The quality of hot runner products is
designed with 10 years' service life, and the design life of products with fiber
added within 15% is designed with 2 million times of mold.

》Zhenxiong focuses on engineering material and high fiber products
   Imported steel, specially treated, more wear - resistant and corrosion -resistant
Zhenxiong nozzles are made of imported steel with special treatment, effectively ensuring the life of products. The quality of hot runner
products is designed with 10 years' service life, and the design life of products with fiber added within 15% is designed with 2 million times of mold.

》Reasons for products yellowing ,black coating.
■ Dead angle existed in nozzle outlet .
Zhenxiong has professional MTO patent for molding transparent/color changing products nozzle.This type of nozzle
has no dead angle, fast color change  and small pressure loss.
■ There is a dead angle at the corner of the manifold. The plug at the
junction angle of the runner adopts smooth transition, and the special
position adopts mosaic structure to ensure the junction angle is smooth.
■ The plastic material stays in the runner too long.
See attached page for detailed calculation of plastic injection volume and
residence time

》Nozzle temperature difference accuracy
The internal temperature error of zhenxiong nozzle is no more than 10 degrees.

product standard
1. 90% of the products are standardized and 90% are in
sufficient inventory.
Standardized production ensures the consistency of quality.
2. Material import
Nozzles are made of ASSAB imported materials, and the
processing technology is strictly controlled to ensure the
interchangeability of
nozzles effectively.
3 .Process standard
The heating coil winding method has been tested strictly, the winding
process is standardized, and high quality is required to ensure stable
quality.

》Causes of wire drawing drooling of gate.
There is no reasonable cooling at the tip of the nozzle.
Reasonable cooling water line should be designed near the nozzle gate to increase
cooling Water line can avoid problems such as wire drawing and drooling caused by
heat accumulation at the gate
The nozzle selection is unreasonable
Zhenxiong nozzle is a special structure without nozzle core, without drawing and
drooling. Valve type nozzle is recommended for drawing caused by extreme injection
molding condition .
The temperature of nozzle is not stable and the long-term production stability is poor.
Zhenxiong heating accessories are imported , see the attached page

》Causes for valve needle stuck:
1. The valve needle is too long with the needle brush.
The matching length between the guide brush and the valve needle of zhenxiong
is shorter than other companies,which get less needle stuck.
2. Improper fitting tolerance between valve needle and needle brushing.
The matching tolerance between the guide brush and the valve needle of Zhenxiong
is customized according to the fiber adding material, and it has been tested and verified
repeatedly to ensure no leakage and needle stuck.
3. Processing error leads to unqualified or unstable quality.

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