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1 Mar 2017
The power required for a good seal is directly proportional to the seal area of the product. After the pre-seal cycle, the main seal power is applied to the dies. Nice controlled rise of power can bring consistency in the RF Welding process and prevent flashes or material burns.

If too much energy is applied, the material will burn. While if the energy is not enough, the material layers will not bond. Partially sealed areas are caused by low RF energy.

As the material temperature rises, a state of equilibrium is achieved between the generated heat and heat loss through the dies. Heat loss is greater with thinner materials. Ultra-thin materials’ heat loss is too much and buffer materials are used to reduce the heat loss through the die surface.

When setting up a new sealing or welding job, the first test should be with minimum power, moderate time and around 80 PSI pressure. If the seal is weak, power should be increased gradually.

The dies must be held parallel to produce even pressure around the seal area. If there is too much extrusion or if the seal is too thin, the press sealing stops need to be adjusted. To set the stops, adjust the press to half the total thickness of the material. Close the press and adjust the stops finger tight. Then, insert the full thickness of material in the press and make a seal. Check the results and lower or raise the stops as required. Lock the stops in place.

If the seal is weak at a particular area, the dies are not level. The leveling screws should be checked and adjusted. If these adjustments are still unsatisfactory, the use of a shim may be required or the dies must be surface ground.

After several RF welding cycles, the dies warm up and the system parameters (time and power) may require re-adjustment. To eliminate parameter adjustments, some dies are designed with heated upper platens that pre-heat them to the proper operating temperature. This process is used in tear seal applications.
Contact us :
mail:hgs@dongxiong.com
web: davison-machinery .com
1 Mar 2017
Why buy a treadmill? Using a treadmill is a great way to lose weight, tone your legs and cardiovascular system, and train for competitions. Having a home treadmill makes it easy to stick to a workout schedule; it eliminates excuses! Treadmills can also make exercise more fun. A lot of treadmills can connect to the Internet, immerse you in interactive video, and simulate the rise and fall of real-life routes.

This treadmill buying guide can help you choose the best treadmill for your budget and fitness goals. A number of important treadmill features are explained below.

Jump to:

Cushioning

Folding Treadmills

Inclines and Declines

Motors

Programming

Track Size

Track Durability
more:http://www.nbjada.com/
1 Mar 2017
Breaking logs and wood up by hand can be painful, time-consuming, and dangerous. And, while electric log splitters are highly effective, they are also expensive. Instead, you can build a manual wood splitter at home with simple parts for less money than even a used splitter.

Warning: As with any machinery, it is essential that you take proper precautions when building and operating your manual log splitter to avoid injury. Be familiar with how to use your splitter and wear protective equipment. Always keep hands, feet, and other body parts away from the blade system. Thoroughly clean your splitter after each use, and regularly sharpen the blades to increase the lifespan and safety of the machine.

Step 1 – Weld the Blades Together

Weld the four blades together in a cross shape. Be sure to wear proper safety attire for this step, and complete it in a well-ventilated area. To weld the blades, you may find it helpful to cut off the inner corners of them. Start by welding two blades together at a 90-degree angle. Repeat this step for the other two blades, and then weld the two pairs of blades together.

Step 2 – Weld the Blades Into the Pipe

Cut about 20 inches of steel pipe, and cut notches on one end to match up with the four blades. Weld the blades into the pipe, reinforcing a tack-weld with a stronger weld or filler bar for reinforcement.

Step 3 – Set up Your Hydraulic Pump

Home-improvement centers carry basic hydraulic-pump systems. A working pressure of about 1,500 pounds per square inch should be adequate for the average log splitter. Set up the hydraulic pump according to any instructions given by the manufacturer.

Step 4 – Attach the Blade System to the Pump

Fit the blade system to the completed hydraulic pump. Ensure that the pump is deactivated while setting up the blades. Once the blade system is attached, test the log splitter with a piece of practice wood and make any adjustments to the blades or pump as necessary.

Warning: Be sure your system is deactivated while setting up the blade. Not turning it off while completing this step could result in injury.

If you have any questions or concerns about your log splitter, consult with a home-improvement specialist for further advice.

CNSuperpower Log Splitters provides a full range of log splitters from home, cottage and industrial use.

Contact us

Add:No.391 Huimin road,

Huimin town,Jiashan county,Zhejiang,P.R.China

Tel: +86-(0)573-84647355

+86-(0)573-84643695

+86-(0)573-84647353

Fax:86-573-84644138

E-mail:sp@cnsuperpower.com
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