US 12,434,417 B2
Rubber extrusion device and method for manufacturing rubber extrudate
Yuki Furubayashi, Shinshiro (JP); and Satoru Nishio, Shinshiro (JP)
Assigned to The Yokohama Rubber Co., LTD., Tokyo (JP)
Appl. No. 16/486,746
Filed by The Yokohama Rubber Co., LTD., Tokyo (JP)
PCT Filed Dec. 25, 2017, PCT No. PCT/JP2017/046319
§ 371(c)(1), (2) Date Aug. 16, 2019,
PCT Pub. No. WO2018/150733, PCT Pub. Date Aug. 23, 2018.
Claims priority of application No. 2017-026510 (JP), filed on Feb. 16, 2017.
Prior Publication US 2019/0358881 A1, Nov. 28, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 48/12 (2019.01); B29C 48/07 (2019.01); B29C 48/31 (2019.01); B29C 48/88 (2019.01); B29C 48/92 (2019.01)
CPC B29C 48/12 (2019.02) [B29C 48/07 (2019.02); B29C 48/31 (2019.02); B29C 48/88 (2019.02); B29C 48/92 (2019.02); B29C 2948/9258 (2019.02); B29C 2948/92704 (2019.02); B29C 2948/92885 (2019.02); B29C 2948/92904 (2019.02)] 12 Claims
OG exemplary drawing
 
1. A rubber extrusion device, the rubber extrusion device comprising a cylindrical cylinder, a screw disposed in an internal space of the cylinder, a head installed at a leading end of the cylinder and including an extrusion flow path communicating with the internal space, and a die attached to the head at a leading end position of the extrusion flow path, the die including an extrusion port configured for extruding a non-hollow strip member,
the rubber extrusion device comprising a moving unit configured to move the die during extrusion at least in a uniaxial direction relative to the head along a leading end surface of the head, the moving unit comprising a motor or a hydraulic cylinder and being capable of fixing the die and the head in a desired relative position, thereby an amount of curving of the non-hollow strip member with respect to an extrusion direction is reduced; and
the rubber extrusion device comprises another moving unit configured to move the die during extrusion in a direction orthogonal to the uniaxial direction relative to the head along the leading end surface of the head, wherein
the another moving unit is connected by a connecting arm to the moving unit and the moving unit moves the another moving unit via the connecting arm in the uniaxial direction with respect to the head along the leading end surface of the head.
 
12. A rubber extrusion device, the rubber extrusion device comprising a cylindrical cylinder, a screw disposed in an internal space of the cylinder, a head installed at a leading end of the cylinder and including an extrusion flow path communicating with the internal space, and a die attached to the head at a leading end position of the extrusion flow path, the die including an extrusion port configured for extruding a non-hollow strip member,
the rubber extrusion device comprising a moving unit configured to move the die during extrusion at least in a uniaxial direction relative to the head along a leading end surface of the head, the moving unit comprising a motor or a hydraulic cylinder and being capable of fixing the die and the head in a desired relative position, thereby an amount of curving of the non-hollow strip member with respect to an extrusion direction is reduced; wherein
the rubber extrusion device further comprises a sensor configured to detect the amount of the curving, with respect to an extrusion direction, of the non-hollow strip member extruded from the extrusion port at a distance in a direction of the extrusion flow path of from 400 mm to 600 mm from the die;
the rubber extrusion device further comprises a control unit to which correlation data between fluctuation parameters including rubber physical properties of the non-hollow strip member and extrusion conditions and the relative position between the die and the head along the leading end surface of the head and the manner of curving of the non-hollow strip member in a case of extrusion in the relative position is input;
the control unit moves the die by controlling operation of the moving unit;
in a case where extrusion of the non-hollow strip member is started, the rubber extrusion device is preset by inputting actual data of the fluctuation parameters to the control unit and based on data of the fluctuation parameters which has been input and the correlation data, which has been input in advance in the control unit, the control unit places the die at a predetermined position with respect to the head and extrusion is then performed wherein the control unit is configured to move the die relative to the head based on the actual data and the correlation data such that the non-hollow strip member has a desired shape prevented from being unintentionally curved.