IP Library › Granted Patent US 12673455

Granted Patent B2

US 12673455 · App. 17/768,842 · Granted Jul 7, 2026

Molding machine

Inventors: Takayuki Hirano (Tokyo, JP); Kazuma Hamada (Tokyo, JP)

Assignee: THE JAPAN STEEL WORKS, LTD.

B29C45/768 B29C45/00 B29C45/03 B29C45/26 B29C45/76 B29C45/84 B29C2945/76103 B29C2945/76187 B29C2945/7619 B29C2945/76481

View Patent ↗

Loading inventors, assignments & file history…

Monitor This Case

Get email alerts when status or documents change.

Order Certified Copies

Most orders are placed with the USPTO same day — all within 24 business hours.

Order via The Patent Place →

Pre-filled with this patent's details

Quick Facts

Patent No.: US 12673455
App. No.: 17/768,842
Granted: Jul 7, 2026
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

Abstract

The molding machine includes a cylinder, a screw built in the cylinder, and a state detection device. The state detection device includes a sensor for detecting a state of the screw. The state detection device is attached to the screw outside the cylinder.

Claims (73)

1 . A molding machine comprising:

a cylinder;

a screw built in the cylinder;

a telemeter; and

a base unit arranged at a position facing the telemeter, the telemeter and the base unit not being connected by wiring,

wherein the telemeter includes a first sensor and a second sensor for detecting a state of the screw,

wherein a housing of the telemeter is composed of a pair of housing portions made of a non-conductor,

wherein the telemeter is attached to the screw by sandwiching the screw by the pair of housing portions outside the cylinder,

wherein the first sensor is arranged in one of the pair of housing portions,

wherein the second sensor is arranged in the other of the pair of housing portions,

wherein the first sensor and the second sensor are arranged at positions symmetrical to each other with respect to a rotation center axis of the screw,

wherein the first and second sensors are pressed to the screw so as to be in direct contact with the screw,

wherein a power receiving coil, a processor, and a data transmitting coil are embedded in the housing of the telemeter or are arranged in concave portions formed in the housing of the telemeter, and

wherein the base unit includes a power transmitting coil configured to wirelessly supply power from an external power source to the power receiving coil of the telemeter, a data receiving coil configured to wirelessly receive data from the data transmitting coil of the telemeter, and a processor configured to process and transmit the received data to a data receiving device external to the molding machine.

2 . The molding machine according to claim 1 ,

wherein the housing of the telemeter is made of a resin.

3 . The molding machine according to claim 1 ,

wherein the first and second sensors detect deformation of the screw.

4 . The molding machine according to claim 3 ,

wherein the first and second sensors are strain gauges.

5 . The molding machine according to claim 1 ,

wherein the telemeter further includes elastic sheets, and

wherein each of the first and second sensors is located between a corresponding elastic sheet and the screw and is pressed to the screw by the elastic sheet.

6 . The molding machine according to claim 5 ,

wherein the telemeter further includes metal plates, and

wherein one of the metal plates is located on a surface of the elastic sheet on an opposite side of a surface in contact with the first sensor and is pressed to the elastic sheet, and another metal sheet is located on a surface of the elastic sheet on an opposite side of a surface in contact with the second sensor and is pressed to the elastic sheet.

7 . The molding machine according to claim 6 ,

wherein surfaces of the metal plates in contact with the elastic sheets are curved surfaces.

8 . The molding machine according to claim 7 ,

wherein the telemeter further includes screw members, and

wherein the metal plates are pressed to the elastic sheets by the screw members.

9 . The molding machine according to claim 8 ,

wherein the telemeter further includes nuts in which the screw members are inserted, and

wherein the nuts are plate shaped and are in contact with the housing of the telemeter.

10 . The molding machine according to claim 1 ,

wherein a first portion of the screw protrudes from an upstream side end of the cylinder, and

wherein the telemeter is attached to the first portion of the screw.

11 . The molding machine according to claim 1 ,

wherein the external power source is a wireless power supply or an environmental power generation.

12 . The molding machine according to claim 1 , further comprising:

another screw which is the same as the screw,

wherein the telemeter is attached to each of the two screws.

13 . A molding machine comprising:

a cylinder;

a screw built in the cylinder;

a shaft coupled to the screw outside the cylinder;

a telemeter; and

a base unit arranged at a position facing the telemeter, the telemeter and the base unit not being connected by wiring,

wherein the telemeter includes a first sensor and a second sensor for detecting a state of the screw,

wherein a housing of the telemeter is composed of a pair of housing portions made of a non-conductor,

wherein the telemeter is attached to one or both of the screw and the shaft by sandwiching one or both of the screw and the shaft by the pair of housing portions outside the cylinder,

wherein the first sensor is arranged in one of the pair of housing portions,

wherein the second sensor is arranged in the other of the pair of housing portions,

wherein the first sensor and the second sensor are arranged at positions symmetrical to each other with respect to a rotation center axis of the screw or the shaft,

wherein the first and second sensors are pressed to the screw so as to be in direct contact with the screw,

wherein a power receiving coil, a processor, and a data transmitting coil are embedded in the housing of the telemeter or are arranged in concave portions formed in the housing of the telemeter, and

14 . The molding machine according to claim 13 , further comprising:

a motor; and

a speed reducer connected to the motor,

wherein the shaft is an output shaft of the speed reducer.

15 . A molding machine comprising:

a cylinder;

two screws built in the cylinder;

two telemeters attached to the two screws, respectively, outside the cylinder; and

a base unit arranged at a position facing the telemeters, the telemeters and the base unit not being connected by wiring,

wherein each of the two telemeters includes a first sensor and a second sensor for detecting a state of the attached screw,

wherein each housing of the two telemeters is composed of a pair of housing portions made of a non-conductor,

wherein each of the two telemeters is attached to the screw by sandwiching the screw by the pair of housing portions outside the cylinder,

wherein the first sensor is arranged in one of the pair of housing portions and the second sensor is arranged in the other of the pair of housing portions in each of the two telemeters,

wherein the first sensor and the second sensor are arranged at positions symmetrical to each other with respect to a rotation center axis of the screw in each of the two telemeters,

wherein the first and second sensors are pressed to the screw so as to be in direct contact with the screw in each of the two telemeters, wherein a power receiving coil, a processor, and a data transmitting coil are embedded in the housing of each telemeter or are arranged in concave portions formed in the housing of each telemeter, and

wherein the base unit includes a power transmitting coil configured to wirelessly supply power from an external power source to the power receiving coils of the telemeters, a data receiving coil configured to wirelessly receive data from the data transmitting coils of the telemeters, and a processor configured to process and transmit the received data to a data receiving device external to the molding machine.