Apparatus for correcting the bending of a molten resin and method of correcting the bending of the molten resin

Patent metadata

Field	Value
Publication number	US-9849619-B2
Application number	US-201113884184-A
Country	US
Kind code	B2
Filing date	Nov 10, 2011
Priority date	Nov 11, 2010
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

An apparatus ( 31 ) for correcting the bending of the molten resin includes a temperature-adjusting device ( 32 ) arranged surrounding an extrusion passage ( 12 ) for extruding the molten resin ( 8 ) of an extrusion die head ( 7 ) along the direction of extruding the molten resin ( 8 ), a measuring means ( 33 ) for measuring the horizontal position of the molten resin ( 8 ) extruded from an extrusion opening ( 20 ) of the extrusion passage ( 12 ), and a control means ( 34 ) for controlling the temperature-adjusting device ( 32 ) based on the results measured by the measuring means ( 33 ).

First claim

The invention claimed is:

1. An apparatus for correcting the bending of a molten resin comprising a plurality of cooling passages arranged surrounding a molten resin extrusion passage of an extrusion die head along the direction of extrusion, a measuring means for measuring the horizontal position of the molten resin extruded from an extrusion opening of said extrusion passage, and a control means for controlling said cooling passages based on the results measured by said measuring means, wherein
said measuring means includes an imaging means for picking up the image of an end portion of said molten resin, and a binary processing means for distinguishing a normal region of the end portion of the molten resin in the horizontal direction picked up by the imaging means from a correction region arranged outside the normal region, and
said plurality of cooling passages are independently controlled by said control means, and
said control means allowing a cooling medium to flow into the cooling passages of the extrusion die head positioned on a side opposite the bending direction of the molten resin when the end portion of the molten resin enters the correction region, and
wherein said control means controls a flow of the cooling medium into the cooling passages of the extrusion die head depending upon a number of pixels of the correction region that the end portion has entered into and which has been counted utilizing a binary processed image of the end portion inputted from the binary processing means.

2. An apparatus for correcting the bending of a molten resin comprising a plurality of cooling passages arranged surrounding a molten resin extrusion passage of an extrusion die head along the direction of extrusion, a measuring means for measuring the horizontal position of the molten resin extruded from an extrusion opening of said extrusion passage, and a control means for controlling said cooling passages based on the results measured by said measuring means, wherein
said measuring means includes an imaging means for picking up the image of an end portion of said molten resin, and a binary processing means for distinguishing a normal region of the end portion of the molten resin in the horizontal direction picked up by the imaging means from a correction region arranged outside the normal region,
the correction region is divided to correspond to the arrangement of the plurality of the cooling passages, and
said plurality of cooling passages are independently controlled by said control means, wherein
said control means allowing a cooling medium to flow into the cooling passages of the extrusion die head positioned on a side opposite the bending direction of the molten resin when the end portion of the molten resin enters the correction region.

3. The apparatus for correcting the bending of the molten resin according to claim 2 , wherein said molten resin is cut by a cutting mechanism and is used as a molten resin mass of a predetermined amount for being compression-formed.

4. An apparatus for correcting the bending of a molten resin comprising a plurality of cooling passages arranged surrounding a molten resin extrusion passage of an extrusion die head along the direction of extrusion, a measuring means for measuring the horizontal position of the molten resin extruded from an extrusion opening of said extrusion passage, and a control means for controlling said cooling passages based on the results measured by said measuring means, wherein
said measuring means includes an imaging means for picking up the image of an end portion of said molten resin, and a binary processing means for distinguishing a normal region of the end portion of the molten resin in the horizontal direction picked up by the imaging means from a correction region arranged outside the normal region,
the normal region is set on a circle that is concentric with a center of the extrusion opening of the extrusion die head, and
said plurality of cooling passages are independently controlled by said control means, wherein
said control means allow a cooling medium to flow into the cooling passages of the extrusion die head positioned on a side opposite the bending direction of the molten resin when the end portion of the molten resin enters the correction region.

Assignees

• Yonesato Jun
• Manou Taketoshi
• Toyo Seikan Kaisha Ltd

Inventors

• Yonesato Jun
• Manou Taketoshi

Classifications

• B29C43/08

  with circular movement {, e.g. mounted on rolls, turntables} · CPC title

• B29C2948/92571

  Position, e.g. linear or angular · CPC title

• B29C2043/3438

  moving during dispensing over the moulds, e.g. laying up · CPC title

• B29C2948/92942

  Moulded article · CPC title

• B29C48/87

  Cooling · CPC title