our dished heads are used in a variety of applications and industries such as storage tanks, pressure vessels, road tank, food processing operations, chemical plants ,Nuclear operation, Oil Refining, Architectural feature, power generation.
Due to our forming experience and equipment, we can spin or press the first part of the process of forming your products, It depend on the thickness and material performance,
Our main products are 2:1 SE dished heads, Torispherical heads, Cones,Hemispherical Heads etc
Choosing the right type is the key decision for each customer and one for which our experience team to happy to give advice, simple speaking, the torispherical heads, the less ressure it can withstand, Conversely, the deeper dished heads, for example Elliptical heads, hemispherical, the greater pressure it can take.
Our in house-capability to form dished heads by cold press brings major benefits to our customers and sets us apart from others dished heads manufactures
For carbon steel dished heads, we can forming this dished heads from 76-9000mm in diameter and below 250mm in thickness
The general forming process as the below sketches
Technical Delivery Condition
2,Enquiry/order required information
We can give our clients once they gave us the below information
But if clients tolerance is higher than below Hokkai standards, it shall be provided to Hokkai prior to offer or ordering.
Hot Press Dished Head,Hot Press Hemispherical Dished Head,Hot Press Elliptical Head,Hot Mould Press SS Dish Heads YIXING HOKKAI HEAD PLATE CO.,LTD , http://www.hokkaidishedend.com
Screw Series
                                Â
              Material
  EPS4000
            Bimetallic Alloy
              ASSAB A-88
  EPS5000
         HITACHI SKD-61, SKH-55
  EPS6000
             ASSAB V10, PM60
  EPS7000
             Full Spray AlloyÂ
  EPS8000
               ASSAB Elmax
            SCREW   SPECIFICATION
  Screw Diameter
    20-220 mm
  Mould Clamping Force
     250-3200 T
  Shot Weight
     30-30000GÂ
  Nitrided Layer Depth
    0.5-0.8 mm
  Nitrider Hardness
    900-1000 HV
  Nitrided Brttleness
    Less than grade 1
  Surface Roughness
    Ra 0.4
  Linearity of Screw
    0.015 mm
  Hard-Chrome Plating
    >= 950
  Chrome-Plating Layer Depth
    0.025-0.085 mm
  Bimetallic Layer Depth
     3 mm
  Alloy Hardness
     HRC 62-72
Screw Production Process
  Customer Order--- Material Procurement---Normalizing/Homegenizing---Dring---Rough Turing---Rough Thread Rooling---Alignment and Stress Release---Fine Rough Rolling---Mixing/Stirring Zone---Alignment Polishing---Grinding---QC---Iron Nitrogenizing(120 hour)---Alignment/Polishing---Polishing/Grinding---Cryogenic treatment---PVD plating---O.D Grinding---FQC---Packing and Shipping
Our Advantages
1.       Over 20 years experiences of manufacturing and designing screw
2.       Professional design and R&D team
3.       Customized service for each customer
4.       Fast response to each inquiry
5.       In-time after sale service
FAQ:
1. What's the quality of JHM screw barrel like?
We apply advanced manufacturing management system, including professional design and order processing software and ERP system, to assure product quality and competitive cost.
2. How long does it take to receive my product after I place the order ?
Delivery time varies from 25 to 35 days according to the different materials of screws.
3. How about the after service of JHM product?
 Generally, customer often demands the QC to check our goods when we are going to ship. In case of the customer receives shipment and finds some quality problem, we will accept a claim if it is our responsibility.
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Want to know more? Welcome to view our official website: www.dgjingheng.com
1,Our material (hot Rolled Unalloyed structural steel, high and low temperature steel, High Alloy steel)
We have no carbon steel plates in our stock and most of plates are from Chinese steel market or mill. Meanwhile As Japanese owed company, We can also source the plates from Japanese ex-mill if end user can`t accept ex-chinese mill.
Basically the delivery time shall be below 20days for dished heads if plates are from steel market. and Max plates width from them is below 2200mm. it means that the seamless dished heads diameter shall be below about 1800mm.
The max width CS plates that Chinese mill can do is below 4700mm,and dished heads can be seamless below 3800mm in diameter.
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