With the vigorous development of the transportation industry, the status of refrigerated trucks has also been higher. In order to ensure the preservation and freezing of foods, refrigerated trucks have become an indispensable means of transport. How much do you know about it for a refrigerated truck? Let's take a look.
The development stage of a refrigerated truck can be divided into three phases. When the first stage was started, the refrigerated car was an integral structure that was infused with a foamed metal skin. This process was consistently adopted by all refrigerated truck companies at the time. Of course, products made using this process are also not perfect. Many products have a large number of cold bridges due to the presence of a large amount of metal materials on the car body, and there are defects in the injected foam insulation that are not easy to find. This results in an ineffective quality assurance of the inherent quality, because the foamed material has an insulating effect, but it can also be used as a binder, which can result in a poor adhesion, resulting in a poor insulation effect.
With continued development, the second phase of technology is significantly better than the previous one. The entire second refrigerated vehicle is a structure in which foamed glass steel is injected, and this structure greatly improves the previous problem. This design structure is not only used in this time, it will be used in the future third-generation refrigerated truck manufacturing companies, showing the superiority of this technology. Although this product has progressed a lot on the basis of the first stage product and greatly improved the heat preservation effect, there are still defects that the adhesion is not strong.
The third stage is the use of a fully enclosed polyurethane plate bonded glass steel structure. This is also a perfect one in all designs. At the same time, this technology is used in the production of the next two generations of refrigerated trucks. Low weight and low heat loss is its advantage, good insulation effect is its big feature. The binder uses unsaturated polyester resin, plus a cushion, and rigid polyurethane foam is used as a heat-insulating material, successfully creating the concept of low thermal conductivity and high strength. Of course, there are many materials that use high-end, they jointly improve the refrigerated truck. The big drawback here is that the polyurethane has a large loss after cutting, and the material cost is relatively high.
The above is the history of the development of refrigerated trucks. Everyone has already had a deep understanding of it.
Qingdao Yakai Automobile Industry & Trade Co., Ltd. mainly produces and sells: refrigerator cars, insulated cars, special vehicles for dead and dead animals, harmless treatment vehicles, chickens, mobile sale vehicles, postal vehicles, wing drives, and flatbed trailers.
Contact: Gao Xiaohui
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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
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.
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.
Stainless Steel Elliptical Head
Stainless Steel Elliptical Head,Stainless Steel Elliptical Dish,Stainless Steel Sprinkler Elliptical Head,Stainless Steel Material Elliptical Head
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