Injection Molding Hydraulics
2 DAY LECTURE/WORKSHOP
OFFERED ONCE:
June 10-11, 2008 (CRS# 00.737-011)
TUITION: $1045
OVERVIEW
This seminar is an introduction to the field of hydraulics which will be useful to machine operators, technicians, mechanics, plant maintenance personnel or others who need knowledge about the hydraulic functions of molding machinery. Although many of the examples and schematics studied pertain to injection molding, the principles are all directly transferable to applications in other areas of plastics processing such as blow molding, extrusion, thermoforming, etc. as well as non-processing areas such as automation, assembly and packaging. It starts with the fundamentals of fluid power applicable to both hydraulics and pneumatics and then moves on to treat the various mechanical components in a circuit. Pumps, cylinders, valves, conduits, accumulators, intensifiers (boosters), etc. are discussed along with their function in the circuit. Typical circuit schematics are examined in both ISO and ANSI formats. The elements of control are explained, and open and closed loop systems are contrasted. Electrical concepts needed to understand relay ladder logic diagrams for control are studied. This seminar finishes with a hands-on component involving hydraulic circuits and electrical ladder wiring.
CONTENT
Introduction
Professor John D. Colluccini
2 DAY LECTURE/WORKSHOP
OFFERED ONCE:
June 10-11, 2008 (CRS# 00.737-011)
TUITION: $1045
OVERVIEW
This seminar is an introduction to the field of hydraulics which will be useful to machine operators, technicians, mechanics, plant maintenance personnel or others who need knowledge about the hydraulic functions of molding machinery. Although many of the examples and schematics studied pertain to injection molding, the principles are all directly transferable to applications in other areas of plastics processing such as blow molding, extrusion, thermoforming, etc. as well as non-processing areas such as automation, assembly and packaging. It starts with the fundamentals of fluid power applicable to both hydraulics and pneumatics and then moves on to treat the various mechanical components in a circuit. Pumps, cylinders, valves, conduits, accumulators, intensifiers (boosters), etc. are discussed along with their function in the circuit. Typical circuit schematics are examined in both ISO and ANSI formats. The elements of control are explained, and open and closed loop systems are contrasted. Electrical concepts needed to understand relay ladder logic diagrams for control are studied. This seminar finishes with a hands-on component involving hydraulic circuits and electrical ladder wiring.
CONTENT
Introduction
- Hydraulics vs. pneumatics; hydraulic function in clamping, screw rotation and injection; pressure units-psi, kPa, Bar
- Specific gravity, viscosity, viscosity index
- Pascal’s law, Bernoulli’s equation; cylinder rod end effects
- Pumps-gear, vane, piston; cylinders: double acting, single acting; valves: traditional vs. spool type; directional, pressure and flow control valves; positions, ports, activation, normal position; intensifier (booster); accumulator; other misc. components
- ANSI vs. ISO
- Accumulator circuit; booster circuit; regenerative circuit; sequential motion (clamp and work) with sequence valve and with relay logic
- Open vs. closed loop; types of closed loop control - PID controllers; fuzzy logic concept
- Electrical: 8- and 11-pin relays; holding circuits; ladder diagram interpretation
Professor John D. Colluccini
© 1995-2007 University of Massachusetts Lowell,
Continuing Studies, Corporate & Distance Education
Continuing Studies, Corporate & Distance Education