On the surface of the cylinder fins, the presence of the boundary layer causes the flow of cooling air to "displace" outwardly along the normal direction of the fins, which is equivalent to adding an apparent thickness to the fins. The biggest success of Brahsius is to solve the numerical calculation method of the thickness of the laminar flow layer. Due to the enhanced heat transfer technology adopted in the compressor, the forced cooling measures can reduce the thickness of the boundary layer, which means that the increase of the temperature gradient causes the compressor to increase the heat transfer to the outside, thereby achieving the purpose of reducing the temperature of the compressor system. . According to the Brahsius solution of the flat layer of the flat plate, if the thickness of the boundary layer is defined from the surface of the heat sink (normal direction) until the fluid velocity reaches 0.99 times the flow velocity outside the layer, the thickness of the boundary layer is usually a few millimeters. level. This shows that after the effective forced cooling measures are implemented, the influence of the thickness of the surface layer of the fin surface on the heat transfer is limited, clarifying some fuzzy understanding of the boundary layer of the cylinder fin. The temperature field of the cylinder surface of W-0.37/9.6 air compressor was verified by the test from the scientific nature of the low-speed viscous fluid in the flat-plate boundary layer.
The effect of the cylinder fins on the crankcase lubricant temperature is the oil temperature profile. The temperature of the crankcase lubricating oil depends on the heat transferred from the parts above the crankcase to the crankcase. If the temperature of some parts above the crankcase is high, the temperature of the lubricating oil will be higher; vice versa. The use of enhanced heat transfer technology is essential for the design of air-cooled compressors. Reasonable design of the heat sink of each part of the compressor can fully utilize the heat transfer efficiency of the heat sink, minimize the temperature of each part of the compressor temperature field, and rationally utilize the material to achieve twice the result with half the effort. In addition, enhancing the cooling of the compressor can reduce the power loss of the compressor from the isotherm during compression and expansion. Some basic scientific research results such as fluid mechanics and aerodynamics can help us solve design problems theoretically and guide the design in the right direction.
Plastic car exterior parts refer to front and rear bumper moulds, fog lamp moulds, and grilles and all plastic accessories, are requesting high quality with hardened steel 1.2738 or Finkl P20 hard steel in order to guarantee specified mould life such as 1000000shots. Plastic injection material is PP or ABS as per customer's requirement. Ceeto company has skilled design engineering team who is able to design plastic car bumper moulds as per part geometry, bumper mould design will be first considered hidden parting line or visible parting line according to DFM analysis and moldflow report.
Technical information for Car front bumper and rear bumper mould
- Design software: Pro-E
- Mould cavity: single cavity
Molding material: PP, ABS, PE
- Mould cavity and core steel: 1.2738, P20, P20HH, 718H
- Hot runner system: Synventive, Yudo, HRS, Moldmaster
- Ejection system: Ejector pins, angle lifters
- Leadtime: 120 days
Mould life: 500000 shots to 1000000 shots
- Mould packing: wooden box
Ceeto Service Scope to manufacture car bumper mould
Plastic bumper product DFM analysis
Plastic car bumper mould design
Plastic car bumper mould assembly drawing
Plastic car bumper mould machining
Plastic car bumper mould testing via injection molding machine
Plastic car bumper mould packing
Plastic car bumper samples packing
Mould spare parts preparation
We also support you for prototype mould design and manufacture
Plastic Car Front Bumper and rear bumper mould test
Before we ship bumper mould to you, we will have bumper mould buy-off in house together with you, and we must make official at least three mould tryouts and 2000 empty cycle for mould to check if mould function is ok in a certain time.
Normally, you and we attend the validation procedure together and sign off after checking. What we are checking usually are as follows:
- Compatibility with Injection Machine to be used
- Is size of the mould ( Leight* width* Height ) correct?
- Is weight of the mould is correct?
- Are lifting eyebolts fully seated on the mold and not interfering with mold action?
- Are all transportation bars installed and in correct color as you request?
- Are knock-out holes for mechanical ejection and the layout correct as designed?
- Is electric box wired correctly as per injection machine standard?
- Are dimensions of locating ring correct?
- Is radius and orifice diameter of sprue bush correct?
Are clamping features correct?
- Is the mold construction compatible with robot gripping if applicable to take off part?
Plastic car bumper mould material and heat treatment
What we will also inspect mould material and heart treatment as follows:
- Is any welding used on mold? Is welding process correct for the steel used?
- Have all mold plates been stamped with markings?
- Provide the heat treatment certificate and hardness for all applicable mold components
Are moving parts nitrided? Provide nitride certificate.
We warmly welcome you to visit us and send us RFQ, we want to be your part of suppliers and we will do our utmost efforts to make high quality of moulds and products, if you have any doubts about technical points, please don't hesitate to let us know, we are looking forward to hearing from you, thanks a lot.
Automotive Exterior Plastic Injection Mould,Injection Molding Automotive Parts,Plastic Car Front Bumper,Plastic Car Rear Bumper
Zhejiang Ceeto Molding Technology Co.,Ltd. , http://www.ceetomold.com