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What is the difference between shock load and gradually applied loads and suddenly applied Load?

The only difference between a shock load and a gradually applied load is something called an impulse; defined as the integral of a force with respect to time. When a force is applied to a rigid body it changes the momentum of that body. A small force applied for a long time can produce the same momentum change as a large force applied briefly, because it is the product of the force and the time for which it is applied that is important.


Design of riser and gating system?

Riser Should be Design by taking the idea of solidification time of casting,design should be in such a way that it solidifies after casting to produce sound casting.and it is done by making the volume to area ratio higher than the casting. Waseem Amwar UET peshawar


How do you calculate shot capacity for plastic injection molding?

Production rate of injection molding machine depends upon cycle time (total time that machine takes to produce a product in one cycle) and the number of cavities. For calculating cycle time, you must consider time for each phase that machine takes in one cycle. That phases are: Mold closing / clamp Filling Pack and hold Cooling and Recovery (40-60% ) Mold Open Ejection Add time taken by each phase. For example, this time is 15 seconds and the number of cavities are 2. So the production rate is 2 finished product per 15 seconds. You can increase your production by decreasing the cycle time. You can decrease cycle time by following some points: Keep wall thickness to minimum required for your product Ensure your machine is fine-tuned Ensure proper cooling system, injection pressure and injection speed is applied.


What is the formula for calculating time when you know the initail speed final speed and the distance?

Time = Distance / Speed "/" means divide Calculate the average speed then put it into the equation. For example: Time (hours) = 42 miles / 86 miles per hour Time = 0.49 hours Time = 29.4 minutes (60x0.49)


What is ramp rate?

We are calculating the response time of the ramp input signal (temperature), ramp rate is a Temperature varies linearly with time.