A sewing machine consists of four basic mechanisms: a take-up mechanism, a needle-motion mechanism, a material-feeding mechanism, and a bobbin. Its proper operation requires a delicate balance of these mechanisms. This paper introduces a…
A sewing machine consists of four basic mechanisms: a take-up…
It is usually slow and inefficient to mold thermoplastics using the compression molding techniques described above. In particular, it is necessary to cool a thermoplastic part before removing it from the mold, and this requires that the mass of metal…
It is usually slow and inefficient to mold thermoplastics using the…
Pneumatic nailers can slash the time it takes to fasten everything from window trim to roof rafters. The basic guts of the tool haven’t changed since the 1960s: Compressed air pushes a piston that drives a rod, forcing nails deep into wood, before the…
Pneumatic nailers can slash the time it takes to fasten everything…
6 Factors to Consider When Choosing Chain Lifting Slings
The Occupational Safety and Health Administration (OSHA) is a body in the United States that plays a critical role in enhancing workplace safety around the country. If you operate a manufacturing…
6 Factors to Consider When Choosing Chain Lifting Slings
The…
What are fishing traps
WHAT IS TRAPPING?
Fishing is one of the oldest ways by which people have fed themselves and their families. Except for gathering shellfish by hand and spearing fish (Figure 1), primitive trapping is probably the oldest form of…
What are fishing traps
WHAT IS TRAPPING?
Fishing is one of the…