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公开(公告)号：JP2002283438A
公开(公告)日：2002-10-03
申请号：JP2001085063
申请日：2001-03-23
Applicant: TORAY INDUSTRIES
Inventor： NOMURA FUMIYASU , CHIGIRA NOBUTSUGU , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacturing a rolled sheet capable of reducing a thickness unevenness of a sheet and upgrading a rolled raw fabric shape. SOLUTION: The apparatus for manufacturing the rolled sheet comprises a mechanical regulating mechanism 25 for regulating a gap of lips 12, a temperature regulating mechanism 27 for regulating a temperature of a molten resin at the distal end of the lip, a thickness meter 10 for measuring the thickness of the sheet after stretching, and a shape measuring or arithmetic means 11 for measuring the outer diameter of a raw fabric shape. The mechanism 25 controls to eliminate a sheet thickness unevenness and a deviation from its target value based on information of the meter. The mechanism 27 controls to eliminate a raw fabric shape deviation and a deviation from its target value based on information of the means 11. The method for manufacturing the rolled sheet comprises the steps of controlling until the sheet thickness unevenness becomes within its target value by the mechanism 25 from the start of manufacturing the sheet, and switching to the raw fabric shape deviation control by the temperature control mechanism 27 after the sheet thickness unevenness becomes within the target value.
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公开(公告)号：JP2002283435A
公开(公告)日：2002-10-03
申请号：JP2001090735
申请日：2001-03-27
Applicant: TORAY INDUSTRIES
Inventor： MITSUHATA HARUHIKO , KAWATAKE HIROSHI , NISHIDA TAKANORI , TAKASHIMA NAOHIRO , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacturing a resin sheet capable of rapidly manufacturing the sheet by improving/stabilizing an electrostatic application force. SOLUTION: The method for manufacturing the resin sheet by an electrostatic application method comprises the step of regulating a relative position of an auxiliary electrode 5 to a main electrode 3 to control a current leakage ratio (a) obtained by formula (1): a (%)=(i1 /i0 )×100 from a leakage current i1 from the electrode 3 to the electrode 5 and a total discharge current i0 from the electrode 3 is controlled to a range of 30 to 90%.
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公开(公告)号：JP2002248670A
公开(公告)日：2002-09-03
申请号：JP2001048280
申请日：2001-02-23
Applicant: TORAY INDUSTRIES
Inventor： CHIGIRA NOBUTSUGU , NOMURA FUMIYASU , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a sheet capable of simply and effectively regulating its thickness so as to manufacture the sheet and a mouthpiece for extrusion molding the sheet. SOLUTION: The mouthpiece for manufacturing the sheet enables the accurate regulation of the thickness by utilizing a thermal expansion of a bolt, then the regulation of the thickness of the end of the sheet from a neutral point of a lip deformation. Thus, the mouthpiece is free from a problem steps such as a disengagement of a clip or the like in the manufacturing process of the sheet.
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公开(公告)号：JP2002225107A
公开(公告)日：2002-08-14
申请号：JP2001021483
申请日：2001-01-30
Applicant: TORAY INDUSTRIES
Inventor： TANAKA SUKEYUKI , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To efficiently design a feeding block by not laminating a front layer of a multilayer film up to a film end but surely laminating on a product by using an extruder of the multilayer film in combination with a single layer mouthpiece and the block. SOLUTION: The extruder of the multilayer film forms the multilayer by combining a melt polymer flow for a core layer and a melt polymer flow for the front layer, and extruding from a mouthpiece slit outlet. In this case, the front layer of the multilayer is not laminated up to the film end but surely laminated on the product by specifying a sectional shape of a polymer channel in a polymer combining unit of the block.
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公开(公告)号：JP2002211808A
公开(公告)日：2002-07-31
申请号：JP2001007759
申请日：2001-01-16
Applicant: TORAY INDUSTRIES
Inventor： NISHIDA TAKANORI , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a film manufacturing method capable of cleaning a substance adhered to a conveyance roll without interrupting a production process and having excellent productivity. SOLUTION: In this film manufacturing method for winding a film around a turret winder 6 while conveying it by the conveyance roll 32 to wind it continuously without interruption by turreting per full winding, the conveyance roll 32 is cleaned while continuing continuous winding, and a length of the film wound around the turret winder 6 is measured during cleaning.
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Patent Agency Ranking
公开(公告)号：JP2002172679A
公开(公告)日：2002-06-18
申请号：JP2000372266
申请日：2000-12-07
Applicant: TORAY INDUSTRIES
Inventor： CHIGIRA NOBUTSUGU , NOMURA FUMIYASU , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a method of manufacturing a sheet which can further shorten a start-up time at the start of production in the case of controlling a sheet thickness by using a thickness gage. SOLUTION: On the occasion when the sheet S is extruded from a die 4 and stretched, the thickness of the end parts of the sheet S is measured by end part thickness gages 6b and that of the product part thereof by a product part thickness gage and, based on the measured values, apertures of end part discharge zones and a product part discharge zone of the die 4 are regulated to make the sheet S have an intended thickness. In this method, the end part thickness gages 6b and the product part thickness gage 6a are disposed between the die 4 and a stretching process 7. Besides, a second product part thickness gage 8 is disposed behind the stretching process 7, and rough regulation is conducted by the product part thickness gage 6a from the start of extrusion to a steady-state speed, while fine regulation is conducted by the second product part thickness gage 8 from the steady-state speed and onward.
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公开(公告)号：JP2002144404A
公开(公告)日：2002-05-21
申请号：JP2000341340
申请日：2000-11-09
Applicant: TORAY INDUSTRIES
Inventor： CHIGIRA NOBUTSUGU , NOMURA FUMIYASU , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a diehead, for a resin sheet with high versatility, which can be applied for the molding of various kinds of resin sheets having a different end part thickness, with the use of the same diehead. SOLUTION: This diehead 4 for the resin sheet has a slit 13 through which the resin sheet S is discharged into a gap between a pair of lips 12 and 12 and a plurality of gap adjusting mechanisms 17e and 17p for adjusting the gap of the slit 13 along at least one of the longer directions of the lips. The gap adjusting mechanism 17e in the end part discharge region E of the slit 13 and the gap adjusting mechanism 17p in the product part discharge region P can be operated independently of each other and the manipulated variable of the gap adjusting mechanism 17e in the end discharge region E is set to be larger than the manipulated variable of the gap adjusting mechanism 17p in the product part discharge region P.
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公开(公告)号：JP2001079928A
公开(公告)日：2001-03-27
申请号：JP26240199
申请日：1999-09-16
Applicant: TORAY INDUSTRIES
Inventor： TAKASHIMA NAOHIRO , KAWATAKE HIROSHI , OKASHIRO HIDETOSHI
IPC: B29C47/88 , B29C48/305
Abstract: PROBLEM TO BE SOLVED: To efficiently mold a resin sheet uniform in thickness. SOLUTION: The average deformation speed ε defined by ε(sec-1)=[ln(D)]/[L /[ V+(V/D)}/2]] [wherein D is a draft ratio (=die lip clearance/average thickness of a resin sheet cooled and solidified on a cooling drum), L is the length (mm) of a molten resin sheet from the die lip to the cooling drum and V is the rotational speed (mm/sec) of the cooling drum] of the molten resin sheet from the die to the cooling drum is controlled with 2-50 sec-1.
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公开(公告)号：JP2000238056A
公开(公告)日：2000-09-05
申请号：JP4416299
申请日：1999-02-23
Applicant: TORAY INDUSTRIES
Inventor： YAMAKAWA KATSUSHI , NISHIDA TAKANORI , OKASHIRO HIDETOSHI
Abstract: PROBLEM TO BE SOLVED: To provide an apparatus and a method for making a film, in which the floating-up amount of a circulating belt is surely suppressed below an allowable value during a predetermined function is shown in a sucking means, and the miniaturization of the sucking means is possible. SOLUTION: In a film making apparatus, in which a resin film 2 delivered from a mouthpiece 1 is cast on a traveling casting surface 5 formed by a circulating endless belt 4 and, at the same time, a sucking means 9 for producing a negative pressure region 10 on the upstream side in the casting surface moving direction from the landing point of the resin film 2 onto the casting surface 5 is provided, the force caused by the sucking means 9 so as to be applied to the belt 4 in a belt floating up direction is set to be smaller than the drag in the direction opposite to the floating up direction, which is caused by the tension of the belt 4 and its own weight.
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公开(公告)号：JP2000233420A
公开(公告)日：2000-08-29
申请号：JP3549899
申请日：1999-02-15
Applicant: TORAY INDUSTRIES
Inventor： YAMAKAWA KATSUSHI , NISHIDA TAKANORI , OKASHIRO HIDETOSHI
IPC: B29C41/24 , B29C48/305 , B29L7/00 , B29C47/14
Abstract: PROBLEM TO BE SOLVED: To prevent a casting surface from being damaged by coming into contact with a close contacting surface, reduce the amount of adhesion of an oligomer or the like to a mouthpiece and the close contacting surface and prevent the development of defects from occurring by a method wherein a layer, the hardness of which is lower than that of the constituent material of the casting surface, is provided on the close contacting surface facing the casting surface. SOLUTION: A resin film 2 from a mouthpiece 1 is discharged on the traveling casting surface 5 of an endless belt 4 spanned between drums 3a and 3b. In addition, on the back surface side of the mouthpiece 2 or on the upstream side in the traveling direction of the casting surface from the landing point of the resin film 2 onto the casting surface 5, a close contacting sucking nozzle 7 adjacent to the mouthpiece 1 is provided. The sucking nozzle 7 has a sucking nozzle part 9, which produces a negative pressure region 8 directly contacting with the resin film 2, and a sucking nozzle part 9, which produces an upstream side negative pressure region 10 not directly contacting with the resin film 2. Onto the surface towards the casting surface 5 of the sucking nozzle 7 or on the under surface of the sucking nozzle 7, a thin film layer 14, which is made of a heat resistant and solvent resistant fluororesin and the hardness of which is lower than that of the constituent material of the casting surface, is pasted. Thus, the casting surface 5 is prevented from being damaged by coming into contact with the under surface of the sucking nozzle and defects can be avoided developing by reducing the adhesion of oligomer or the like on the under surface of the sucking nozzle.
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