# US 2019/0314890 A1 · Relay device and pressure detection device

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- Number: US 2019/0314890 A1
- Document ID: US20190314890A1
- Status: Published application
- Kind: A1
- Application number: 16/467,203
- Filed: 2017-10-10
- Published: 2019-10-17
- Earliest claimed: 2016-12-08
- Assignees: MINEBEA MITSUMI Inc.
- Applicants: MINEBEA MITSUMI Inc.
- Inventors: Yoshimasa TAKAYAMA
- Web page: https://patentgrep.com/patent/US20190314890A1

## CPC

- B22D 17/32: Controlling equipment
- B22D 18/02: Pressure casting making use of mechanical pressure devices, e.g. cast-forging (B22D18/04 takes precedence)
- B29C 45/26: Moulds
- B29C 45/77: of velocity or pressure of moulding material
- G01L 7/00: Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements ({G01L11/004 takes precedence;} transmitting or indicating the displacement of mechanical pressure-sensitive elements by electric {, e.g., photoelectric} or magnetic means G01L9/00; measuring differences of two or more pressure values G01L13/00; measuring two or more pressure values simultaneously G01L15/00)
- G01L 27/00: Testing or calibrating of apparatus for measuring fluid pressure
- G01L 27/005: {Apparatus for calibrating pressure sensors}
- B29C 2945/76006: Pressure
- B29C 2945/76244: ejectors
- B29C 2945/76257: cavity
- B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G)

## Abstract

A relay device and a pressure detection device are provided that are configured to eliminate the necessity of calibrating an output value from a pressure sensor in the pressure detection device even when a mold is replaced. A relay device for a pressure detection device provided with a pressure sensor (S1 to Sn) configured to detect an inner pressure in a cavity (CT) of a mold of an injection molding machine is provided. The relay device is integrally fixed to the mold. The relay device includes a storage configured to store specific information of the pressure sensor (S1 to Sn) provided to the mold to detect the inner pressure of the cavity (CT), the cavity (CT) being defined between a fixed-side mold and a movable-side mold of the mold.

## Claims

### Claim 1

A relay device for a pressure detection device provided with a pressure sensor configured to detect an inner pressure of a cavity in a mold of an injection molding machine, the relay device being characterized in that
the relay device is integrally fixed to the mold, and
the relay device comprises a storage configured to store specific information of the pressure sensor provided to the mold to detect the inner pressure of the cavity, the cavity being defined between a fixed-side mold and a movable-side mold of the mold, wherein
the specific information is a rated load of the pressure sensor and a pin-sectional area of an ejector pin to which the pressure sensor is attached.

### Claim 2 (depends on 1)

The relay device according to claim 1, wherein the relay device is connected to a signal amplifier of the pressure detection device, the signal amplifier automatically reads the specific information of the pressure sensor.

### Claim 3 (depends on 1)

The relay device according to claim 1, wherein the specific information is calibration information of the pressure sensor held by the pressure sensor.

### Claim 4

(canceled)

### Claim 5

A pressure detection device provided with a pressure sensor configured to detect an inner pressure of a cavity in a mold of an injection molding machine, the pressure detection device being characterized in that
the pressure detection device comprises a relay device integrally fixed to the mold and configured to relay a sensor output from the pressure sensor to an external device, and
the relay device comprises a storage configured to store specific information of the pressure sensor provided to the mold to detect the inner pressure of the cavity, the cavity being defined between a fixed-side mold and a movable-side mold of the mold, wherein
the specific information is a rated load of the pressure sensor and a pin-sectional area of an ejector pin to which the pressure sensor is attached.