Patents by Inventor Masatoshi Senga
Masatoshi Senga has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20140295020Abstract: A toggle clamping mechanism for an injection molding machine includes a toggle link, a crosshead connected to the toggle link, and a driving device for driving the crosshead. A ball spline shaft is provided parallel to a ball screw for driving the crosshead. Further, a ball spline nut provided in the crosshead is engaged with the ball spline shaft so that the crosshead may be guided by the ball spline shaft.Type: ApplicationFiled: March 25, 2014Publication date: October 2, 2014Applicant: FANUC CORPORATIONInventor: Masatoshi SENGA
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Patent number: 8747095Abstract: In a mold clamping mechanism for an injection molding machine, a mold platen stiffness adjusting plate is attached to a mold platen (a movable platen, a fixed platen) at the mold attachment surface thereof. The mold platen stiffness adjusting plate is provided, at the mold attachment surface thereof, with elements for mold attachment that have the same shapes and are arranged on the same places as those provided on the mold platen at the mold attachment surface thereof. Accordingly, the same mold can be attached to the mold platen stiffness adjusting plate attached to the mold platen, and can also be attached to the mold platen from which the mold platen stiffness adjusting plate is detached.Type: GrantFiled: February 28, 2013Date of Patent: June 10, 2014Assignee: Fanuc CorporationInventors: Satoshi Takatsugi, Koichi Nishimura, Masatoshi Senga
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Patent number: 8585395Abstract: In a toggle type mold clamping device including a plurality of link units, a coupling portion of a first link coupled with a toggle driving link is provided on an outer side of an area between a coupling portion of the toggle driving link coupled with a crosshead and a center line of the first link. Furthermore, the first link has a structure in which two members arranged in parallel are coupled and integrated with each other and a space through which the toggle driving link passes is formed between the two coupled members.Type: GrantFiled: April 9, 2012Date of Patent: November 19, 2013Assignee: FANUC CorporationInventors: Masatoshi Senga, Koichi Nishimura
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Publication number: 20130259972Abstract: In a mold clamping mechanism for an injection molding machine, a mold platen stiffness adjusting plate is attached to a mold platen (a movable platen, a fixed platen) at the mold attachment surface thereof. The mold platen stiffness adjusting plate is provided, at the mold attachment surface thereof, with elements for mold attachment that have the same shapes and are arranged on the same places as those provided on the mold platen at the mold attachment surface thereof. Accordingly, the same mold can be attached to the mold platen stiffness adjusting plate attached to the mold platen, and can also be attached to the mold platen from which the mold platen stiffness adjusting plate is detached.Type: ApplicationFiled: February 28, 2013Publication date: October 3, 2013Applicant: FANUC CORPORATIONInventors: Satoshi TAKATSUGI, Koichi NISHIMURA, Masatoshi SENGA
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Publication number: 20120288584Abstract: In a toggle type mold clamping device including a plurality of link units, a coupling portion of a first link coupled with a toggle driving link is provided on an outer side of an area between a coupling portion of the toggle driving link coupled with a crosshead and a center line of the first link. Furthermore, the first link has a structure in which two members arranged in parallel are coupled and integrated with each other and a space through which the toggle driving link passes is formed between the two coupled members.Type: ApplicationFiled: April 9, 2012Publication date: November 15, 2012Applicant: FANUC CORPORATIONInventors: Masatoshi SENGA, Koichi NISHIMURA
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Patent number: 8043083Abstract: An injection molding machine is provided with a linear guide block configured to be guided on a linear guide rail and a guide mounting block which is secured to the linear guide block and supports the movable platen. Two mounting bolts and two adjust bolts are disposed individually at two positions, spanning between the movable platen and the guide mounting block. The size of a gap between the movable platen and the guide mounting block is adjusted by independently tightening the adjust bolts, whereby the horizontal tilt of the movable platen is adjusted.Type: GrantFiled: July 16, 2010Date of Patent: October 25, 2011Assignee: Fanuc LtdInventors: Koichi Nishimura, Naruhiro Nishimura, Masatoshi Senga
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Publication number: 20110177187Abstract: An injection molding machine is provided with a power transmission mechanism including a plurality of drive units configured to convert a rotary motion into a linear motion and a motor configured to drive the drive units. Strain sensors are affixed individually to respective supporting members for the drive units. An abnormality signal indicative of the occurrence of an abnormality in the power transmission mechanism is output if the absolute value of the difference between a strain value read by one of the strain sensors and a strain value read by another strain sensor is greater than a previously set value.Type: ApplicationFiled: November 16, 2010Publication date: July 21, 2011Applicant: FANUC CORPORATIONInventors: Koichi NISHIMURA, Masatoshi SENGA
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Publication number: 20110052749Abstract: An injection molding machine is provided with a linear guide block configured to be guided on a linear guide rail and a guide mounting block which is secured to the linear guide block and supports the movable platen. Two mounting bolts and two adjust bolts are disposed individually at two positions, spanning between the movable platen and the guide mounting block. The size of a gap between the movable platen and the guide mounting block is adjusted by independently tightening the adjust bolts, whereby the horizontal tilt of the movable platen is adjusted.Type: ApplicationFiled: July 16, 2010Publication date: March 3, 2011Applicant: FANUC LTDInventors: Koichi NISHIMURA, Naruhiro NISHIMURA, Masatoshi SENGA
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Patent number: 7637734Abstract: A stationary platen of an injection molding machine is composed of a mold mounting plate, a tie-bar connecting member, and a mold clamping force transmission plate. The mold mounting plate is formed of a planar portion for mold fixing and a cylindrical connecting portion that extends from the planar portion and passes through a central through hole of the tie-bar connecting member. The mold clamping force transmission plate connects the cylindrical connecting portion of the mold mounting plate and the tie-bar connecting member with a predetermined gap therebetween lest the connecting member and the mounting plate come into contact and interfere with each other.Type: GrantFiled: June 2, 2008Date of Patent: December 29, 2009Assignee: Fanuc LtdInventors: Koichi Nishimura, Masatoshi Senga
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Publication number: 20090011073Abstract: A stationary platen of an injection molding machine is composed of a mold mounting plate, a tie-bar connecting member, and a mold clamping force transmission plate. The mold mounting plate is formed of a planar portion for mold fixing and a cylindrical connecting portion that extends from the planar portion and passes through a central through hole of the tie-bar connecting member. The mold clamping force transmission plate connects the cylindrical connecting portion of the mold mounting plate and the tie-bar connecting member with a predetermined gap therebetween lest the connecting member and the mounting plate come into contact and interfere with each other.Type: ApplicationFiled: June 2, 2008Publication date: January 8, 2009Applicant: FANUC LTDInventors: Koichi NISHIMURA, Masatoshi SENGA
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Patent number: 7210918Abstract: A rear platen is moved forward toward a fixed platen as much as the amount corresponding to a mold clamping force which is set in advance, in a state in which the toggle mechanism of a toggle type mold clamping system is contracted, to detect that a fixed mold half attached to the rear platen touches a movable mold half attached to the fixed platen. When mold touch is detected, the rear platen is moved backward as much as the amount of stretch of a tie bar which is generated from the mold touch.Type: GrantFiled: March 29, 2005Date of Patent: May 1, 2007Assignee: Fanuc LtdInventors: Hiroshi Watanabe, Masatoshi Senga
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Patent number: 7140872Abstract: A molding machine including a base frame assembly and a clamping mechanism and an injection mechanism provided on the base frame assembly. The clamping mechanism includes a stationary platen carrying a stationary mold; a movable platen arranged movably relative to the stationary platen and carrying a movable mold; a rear platen disposed at a location opposite to the stationary platen about the movable platen; a tie bar tying the stationary platen and the rear platen with each other; a drive section for applying a drive force to the movable platen so as to move the movable platen relative to the stationary platen; and a platen support movably supporting the movable platen on the base frame assembly. The base frame assembly includes a first base frame supporting a first mass including the stationary platen, and a second base frame supporting a second mass including the movable platen, among the components of the molding machine.Type: GrantFiled: March 19, 2004Date of Patent: November 28, 2006Assignee: Panuc LtdInventors: Koichi Nishimura, Masatoshi Senga
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Publication number: 20050214407Abstract: A rear platen is moved forward toward a fixed platen as much as the amount corresponding to a mold clamping force which is set in advance, in a state in which the toggle mechanism of a toggle type mold clamping system is contracted, to detect that a fixed mold half attached to the rear platen touches a movable mold half attached to the fixed platen. When mold touch is detected, the rear platen is moved backward as much as the amount of stretch of a tie bar which is generated from the mold touch.Type: ApplicationFiled: March 29, 2005Publication date: September 29, 2005Applicant: FANUC LTDInventors: Hiroshi Watanabe, Masatoshi Senga
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Publication number: 20040185143Abstract: A molding machine including a base frame assembly and a clamping mechanism and an injection mechanism provided on the base frame assembly. The clamping mechanism includes a stationary platen carrying a stationary mold; a movable platen arranged movably relative to the stationary platen and carrying a movable mold; a rear platen disposed at a location opposite to the stationary platen about the movable platen; a tie bar tying the stationary platen and the rear platen with each other; a drive section for applying a drive force to the movable platen so as to move the movable platen relative to the stationary platen; and a platen support movably supporting the movable platen on the base frame assembly. The base frame assembly includes a first base frame supporting a first mass including the stationary platen, and a second base frame supporting a second mass including the movable platen, among the components of the molding machine.Type: ApplicationFiled: March 19, 2004Publication date: September 23, 2004Applicant: FANUC LTDInventors: Koichi Nishimura, Masatoshi Senga
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Publication number: 20040018271Abstract: A mold clamping device suitable for use in a small injection molding machine and manufacturable with low cost in which a sufficient clamping force is obtained by small number of parts. A link mechanism having a first link member and a second link member is provided between a rear platen and a movable platen. One end and the other end of the first link member are pivotally connected to the movable platen and the second link member, respectively. The second member is connected to the rear platen to be linearly movable with one end slidable along a linear guide provided at the rear platen. A stationary member of a linear motor is arranged at the rear platen and a movable member of the linear motor is provided at the second link member to surround the stationary member. The second link member is linearly moved by the linear motor to expand and fold the link mechanism so that mold halves attached to the stationary platen and the movable platen, respectively are closed to be clamped and opened to be unclamped.Type: ApplicationFiled: June 17, 2003Publication date: January 29, 2004Applicant: FANUC LTD.Inventors: Mitsushi Yoshioka, Masatoshi Senga