Automatic-Core-Pulling-Structure-System-for-Earphone-Mould

Plastic molding process like this

Injection molding

Injection molding is used to produce thin-walled plastic parts for a wide variety of applications, one of the most common being plastic housings. Plastic housing is a thin-walled enclosure, often requiring many ribs and bosses on the interior. These housings are used in a variety of products including household appliances, consumer electronics, power tools, and as automotive dashboards. Other common thin-walled products include different types of open containers, such as buckets. Injection molding is also used to produce several everyday items such as toothbrushes or small plastic toys. Many medical devices, including valves and syringes, are manufactured using injection molding as well.

Common grinding operations

Cam shaft animation

The use of cam and follower systems are vital in engines, where they are used to open and close the inlet valve and the exhaust valve to the cylinder head. The diagram shown opposite shows us a typical camshaft that could be found in a lawnmower engine. The cam and follower system is a plate cam and flat follower system, and of course the function of the system is to open and close the valves at the correct time during the four stroke cycle of the engine (this will be dealt with in more depth later). If you examine the image close you will see that the peaks of the cams are offset by approximately 120 degrees. These ensures that the both valves aren't fully open at the same time.

Camshaft with Plate Cams imparting on a Flat Followers and Valve.

Camshaft of an Engine incorporating a Rocker Arm

The diagram shown above is another typical cam and follower system that could be used in an engine. This system incorporates a rocker arm (shown in blue in the image). In this case the motion the cam imparts on the follower is translated to the valve through a push rod amd the rocker arm.

Camshaft with Plate Cam imparting on a Flat Follower, a Push Rod, a Rocker arm and the Valve.

Quick return mechanism

The Whitworth quick return mechanism converts rotary motion into reciprocating motion, but unlike the crank and slider, the forward reciprocating motion is slower rate than the return stroke. This is why it is called quick return mechanism.

Catia design

Catia design

youtube video

https://www.youtube.com/watch?v=Cs676d6LhdA

Funny video for kids.