Patent
Pressure transducer including coaxial rings
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TLDR
In this article, a displacement sensor is included for determining the displacement of the outer ring about the opening of an injection molding machine, which is directly proportional to the pressure of the material.Abstract:
A pressure transducer for an injection molding machine includes a housing coupled to a nozzle of an injection molding machine. A hollow stress tube, attached to the housing, through which molten material of the injection molding machine flows, bellows in response to pressure from the material. An outer ring having an opening is coupled to the stress tube such that the outer ring expands, causing displacement of the outer ring about the opening, when the stress tube bellows. A displacement sensor is included for determining the displacement of the outer ring about the opening. This displacement is directly proportional to the pressure of the material. In this manner, the pressure transducer determines the pressure of the molten material.read more
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Patent
Fluid parameter measurement in pipes using acoustic pressures
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Daniel L. Gysling,Mark R. Myers +1 more
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References
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Patent
Injection molding control
TL;DR: In this article, a variable length ram stroke is used to adjust shot size in response to the closed-loop feedback of ram position at the instant of attaining of critical pressure in the previous injection cycle.
Patent
Temperature compensated fiber-optic pressure sensor
TL;DR: In this paper, a pressure sensor is defined as a chamber with at least one pressure sensitive membrane and an optic fiber extending through the chamber parallel to the membrane, and a thinner wall which couples with an identifiably distinct portion of the light in the optic fiber to provide a temperature compensated reference.
Patent
Transducer for detecting pressure changes in pipes
TL;DR: In this paper, a transducer for detecting pressure changes in pipes by detecting deformation of the pipes and for converting the pressure change in the pipes into electric signals includes a piezoelectric element having a bimorph structure as a sensor element.
Patent
Pipe pressure sensor
TL;DR: In this article, a diaphragm has a round, sensing, protrusion with a sensing tip (46) on an outer end thereof for extending outwardly from one side of the diaphrasm to extend through a round hole (44) in the pipe so as to communicate pressure in a pipe to the chamber.