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             MobilePhone hot runner
                       Front and rear shell of mobile phone injection conditions:
                       High mold temperature, high molding temperature, thin wall, many colors,
                       high speed and high pressure injection

               Difficulties of product molding:
                       1) white products are prone to yellowing.
                       2) gate  drawing.
                       Injection conditions of mobile phone front and rear shell :
                       High mold temperature, high molding temperature, thin wall, many colors,
                       high speed and high pressure injection



Application case

  》The internal temperature error of Zhenxiong nozzle shall
      not exceed 5 degrees.     


       Zhenxiong hot runner injection molding the metal frame of  mobile phone 
       Results of temperature shock cycle test

       3000 cycle cold and heat shock is the corresponding specification of engine
       room of north American automobile manufacturers for 10 years.
       It has been proved that the products of  zhenxiong injection molding fully
       meet the test standards.

   
  




  》Injection molding white fireproof material, no yellow and no
     drawing, stable quality



                       
                              ◆ Injection molding materials: PC, PC+ABS
                              
 Injection method:tip ,open gate
                              
◆ Customers: Samsung, Huawei, BBK, Xiaomi, Lenovo, etc
                             
 ◆ Advantages of Zhenxiong hot runner
                              ★ white fireproof material, no yellowing, no drawing, high-speed high-pressure
                                    injection, no leakage, stable quality.
                              
  the delivery date can be delivered within 7 days at the soonest.
                              
  valve system quality is more stable, no needle stuck, no leakage .The hot runner
                                    system is designed  according to the service life of 2 million molds, and the
                                    injection molding production is stable.



   The application of mobile phone metal frame .
 


                                
◆ Hot half mold system, easily disassembly, easily maintenance
                                 
◆ Injection materials: PPS+20~40%GF, PBT+20~40%GF
                                     
 Injection method: valve nozzle
                                     
◆ Customers: Huawei, Xiaomi, Samsung, Lenovo, etc.
                                
◆ The advantages of Zhenxiong hot runner :
                                    can provide the hot half mold system according to customer requirements,
                                          which is applicable to multiple sets of molds, easy to disassemble and
                                          assemble, and easy to maintain.

                                     add high glass fiber, stable valve system quality, no stuck, no leakage.The hot
                                          runner system is designed according to the service life of 1 million molds, and
                                          the injection molding production is stable.

                                                                                                                                                 the hot half mold delivery period can be delivered within 10 days at the soonest.



 Application of Mobile phone charger shell  PC white square nozzle system

                         
                    
◆  Injection molding material: PC
                   
◆  Injection method:  valve nozzle or tip nozzle
                    
◆  Customers: Samsung, Huawei, Xiaomi, etc
                    
◆  Advantages of Zhenxiong hot runner :
                   
★  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   with stable molding production .



 
  》
Front and rear shell of mobile phone injection conditions:

                                                                              
◆  High mold temperature, high molding temperature, thin wall, many colors,
                                                                                    high speed  and high pressure injection Difficulties of product molding:
                                                                              
◆  white products are prone to yellowing.
                                                                             
◆  gate  drawing.
                                                                              
★ Injection conditions of mobile phone front and rear shell :
                                                                              
★ High mold temperature, high molding temperature, thin wall, many colors,
                                                                                    high speed  and high pressure injection














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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