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1. 发明专利

JPH09242990A MOLDING FOR LINER OF HIGH PRESSURE VESSEL AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH09242990A
公开(公告)日：1997-09-16
申请号：JP4890096
申请日：1996-03-06
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP
发明人： OTA AKIRA
IPC分类号： F17C1/16 , F17C13/06
摘要： PROBLEM TO BE SOLVED: To provide a blow molded product which is used for liner of a high pressure gas vessel and can obtain the optimum sealing property at all times by adjusting the strength of screwing of a mouthpiece even if there is a slight error in the wall thickness of the liner molded by blowing and pressure itself of high pressure gas which is filled is changed. SOLUTION: It is a blow molded product for a liner of which both ends are in the dome shape and has a cylindrical projection 3 which rises outward on a central axis of both ends and in which a mouthpiece A is inserted in the inside thereof. The mouthpiece A is constituted by integrating a disclike flange part 5 which comes into contract with a ringlike packing 4 by mounting the ringlike packing 4 between domelike inner wall faces and a cylindrical nozzle part 6 which adheres to an inner wall face of the cylindrical projection 3, protrudes outward, and is provided with a screw part on an outer peripheral face at a tip thereof. A mouthpiece C is screwed into the screw part on the outer peripheral face at the tip of the cylindrical nozzle to press the packing 4 on an inner wall face of a dome part 1 from the inside and the outside so that a sealing property by the packing 4 is increased.

2. 发明专利

JPH08323846A RESIN BLOW MOLDED PRODUCT HIGH IN DRAWDOWN PROPERTIES AND MOLDING THEREOF 失效
公开(公告)号：JPH08323846A
公开(公告)日：1996-12-10
申请号：JP13034995
申请日：1995-05-29
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP
发明人： OTA AKIRA
IPC分类号： B29C49/04 , B29C49/00 , B29C49/22 , B29L9/00 , B29L22/00
摘要： PURPOSE: To carry out blow molding of a high drawdown resin of a definite wt. or more by extruding a chemically non-adhesive low drawdown molten resin parison to the outerpost peripheral surface of.high drawdown molten resin parison to clamp molds to perform blow molding and cooling and demolding the molded one before incising and removing only the outermost layer. CONSTITUTION: For example, when a polybutylene terephthalate molten resin layer high in drawdown properties is extruded as a parison of one layer or a plurality layers to be subjected to blow molding, for example, a parison of a polyolefinic resin not chemically bonded to the outermost peripheral surface of the parison and lowest in drawdown properties is simultaneously extruded to be laminated to the parison to form a multilayered parison. This multilayered parison is subjected to blow molding in such a state that split molds are clamped and the obtained multilayered molded product is cooled and demolded to incise and remove only the outermost layer part of the molded product. That is, the outermost layer of the blow molded product 1 high in drawdown properties is incised and removed along a parting line 2.

3. 发明专利

JPH07186278A MULTILAYERED HOLLOW STRUCTURAL MOLDED PRODUCT, MOLDING THEREOF AND EXTRUSION APPARATUS FOR MOLDING 失效
公开(公告)号：JPH07186278A
公开(公告)日：1995-07-25
申请号：JP33443293
申请日：1993-12-28
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP
发明人： OTA AKIRA , YAMASHITA ATSUYA
IPC分类号： B29C49/04 , B29C49/20 , B29C49/48 , B29C65/66 , B29C69/00 , B29K105/20 , B29L9/00 , B29L22/00
摘要： PURPOSE:To enhance the accuracy of the wall thickness of a pre-molded surface layer by forming the pre-molded surface layer in a first cavity formed by a plurality of mold split members among three ones and removing or replacing a part of the mold split members and molding a hollow structure in a second cavity holding the pre-molded surface layer therein. CONSTITUTION:For example, a mold 10 for a car bamper is constituted of first, second and third mold split members 11a, 11b, 11c and the first molded split member 11a becomes a female mold equipped with the air suction mechanism 12 provided in a slide core 13a. The second mold split member 11b constitutes a first mold having a first cavity molding a pre-molded surface layer, that is, a facer part along with the first mold split member 11a and slide cores 14, 15 are provided. Thereafter, the third mold split mold 11c is replaced with the second mold split member 11b to be used as the mold half body of a male mold and a second mold having a second cavity for a hollow structure, that is, a bamper main body part is constituted and a slide core 17 is provided.

4. 发明专利

JPH06335957A BLOW MOLDING SUPPRESSING PRODUCTION OF SINK DUE TO VOID 失效
公开(公告)号：JPH06335957A
公开(公告)日：1994-12-06
申请号：JP12909093
申请日：1993-05-31
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP
发明人： OTA AKIRA , KUSHIMA YUKIMASA
IPC分类号： B29C49/02 , B29D22/00
摘要： PURPOSE:To obtain a blow molded product having a plate-shaped double-wall structure having a high flatness. CONSTITUTION:In performing the blow molding of a molded product having a plate-shaped double-wall structure having a compression part 33 formed by compressing a pair of the wall surfaces 31,32 of a parison, a void insert pin 15 is allowed to face to the mold cavity area corresponding to the compression part 33 and the compressed gas sent in through the gas introducing passage 16 of the void insert pin 15 is allowed to act on the resin of the compression part 33 to form and grow a void absorbing the shrinkage of the resin in the resin. Since the void 34 is grown corresponding to the shrinkage of the resin, shape inferiority such as a sink is not produced on the surface of the product and the compression part 33 provided in order to prevent warpage and to enhance the strength is put to practical use and the molded product having the plate-shaped double-wall structure high in commodity value is obtained.

5. 发明专利

JPH05154824A TRANSFER MATERIAL MADE OF SYNTHETIC RESIN FOR CASTING CONCRETE 失效
公开(公告)号：JPH05154824A
公开(公告)日：1993-06-22
申请号：JP33955391
申请日：1991-11-29
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP , NIPPON STEEL METAL PROD
发明人： OTA AKIRA , KUSHIMA YUKIMASA , YONETANI KIICHI , MATSUI KIYOSHI , TAKANEZAWA YOSHIMITSU
IPC分类号： B28B7/16 , B28B7/26 , B29C49/00
摘要： PURPOSE:To automatically absorb or correct the irregularity due to shrinkage or deformation generated in a transfer material by forming the transfer material transferring an uneven pattern to the surface of cast concrete by blow molding so that mutually engaged stepped parts are provided to the mutually adjacent parts of the transfer materials when a plurality of the transfer materials are assembled at the time of use. CONSTITUTION:Since the outer shape of the transfer surface of a transfer material is generally polygonal, a side having a protruding part 2 and a side having a recessed part 3 are provided to the mutually fitted structural part 1 of the polygonal transfer materials. By combining both parts 2, 3, the dimensional irregularity of the transfer materials can be absorbed. Therefore, the transfer materials can be assembled on a wall surface without hindrance and no concrete leaks from the gaps between the transfer materials. A stepped part is constituted only of the recessed part and a separate member may be inserted. Further, when the rear of the transfer material is formed into a concentrically circular bellows structure, flexibility can be provided to that part.

6. 发明专利

JPH0952279A MULTILAYERED BLOW MOLDED PRODUCT AND BLOW MOLD 失效
公开(公告)号：JPH0952279A
公开(公告)日：1997-02-25
申请号：JP20464495
申请日：1995-08-10
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP
发明人： OTA AKIRA
IPC分类号： B29C49/22 , B29C49/30
摘要： PROBLEM TO BE SOLVED: To easily peel respective inner and outer layers or respective front and rear outer layers by inwardly bending one outermost layer in the vicinity of the boundary line of regions over the almost entire periphery of the boundary line along with an inner layer to strongly hold the same in the U-shaped recessed part of the inner layer. SOLUTION: The boundary line 5 of two regions of a molded product is provided to the central part of the outer peripheral part of a flat plate and the front outermost layer 2 in the vicinity of the boundary line is inwardly bent along with an inner layer 4 to be strongly held in the U-shaped recessed part 4a of the inner layer. By this constitution, two kinds of these resin layers are not separated in the use state of the molded product but not chemically bonded closely. Therefore, if only the vicinity of the boundary line 5 of the inner layer strongly held in the U-shaped recessed part 4a is cut from the molded product, the front outermost layer 2 can be easily and cleanly peeled from the inner layer 4 and the rear outermost layer 3.

7. 发明专利

JPH07123883A FLOAT 失效
公开(公告)号：JPH07123883A
公开(公告)日：1995-05-16
申请号：JP27863693
申请日：1993-11-08
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP
发明人： OTA AKIRA , IMAMURA SHINJI , KANEDA TSUTOMU , FURUKI SATORU
IPC分类号： A01K61/00 , A01K75/04 , B29C39/10 , B29C39/22 , B29C49/00 , B29D99/00 , B29D31/00
摘要： PURPOSE:To provide a float capable of reducing the wall thickness and weight and rationalizing the regulation in production without requiring the excessive improvement in variation and accuracy of the wall thickness and prevent the float from being removed from a raft by deformation and flowing out. CONSTITUTION:This float is used to float a raft for culturing on the sea surface and designed to prevent breakage by buckling in sinking the float into the sea according to the construction formed by installing a stretchable part in the interior of the float body or the body itself or a hollow pipe or hose so as to make the tip thereof always present in the sea, installing a valve in a part of the float in the undersurface of the float and making the internal pressure freely regulable, attaching a check valve to a part of the float and making the float internal pressure always near the maximum value in the history of the external pressure or raising the internal pressure of the float within the range of 1.01 to 2.0 times based on the atmospheric pressure.

8. 发明专利

JPH06155561A MULTILAYER BLOW MOLDING METHOD AND APPARATUS, AND HOLLOW MOLDED PRODUCT OBTAINED BY THE METHOD 失效
公开(公告)号：JPH06155561A
公开(公告)日：1994-06-03
申请号：JP34377492
申请日：1992-12-24
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP
发明人： OTA AKIRA , KUSHIMA YUKIMASA , FURUKI SATORU
IPC分类号： B29B11/10 , B29B11/14 , B29C48/335 , B29C49/00 , B29C49/04 , B29C49/22 , B29C49/78 , B29L22/00 , B65D1/00 , B29C47/26
摘要： PURPOSE:To easily produce a blow molded product partially changed in physical properties along the peripheral direction of the cross-sectional surface thereof by forming demarcation areas mutually different in either one or more of the kinds of resins, the number of layers and layer thickness along the circumferential direction of a parison. CONSTITUTION:When the number of the demarcation areas formed along the circumferential direction of a parison is set to (p), a multi-torus 1 has a flow passage 1a developing the molten resins flowing in from (m) inflow ports in an m-layered structure in a concentric circular state. A Lotus route part 2 has a flow passage 2a distributing respective molten resins into the patterns of preset m-kind n-layered (p) sections and an octopath part 3 has a passage guiding the molten resins developed on the m-layered concentric circular passages 1a of the multi-torus part 1 so as to direct them to the pattern passages 2a of m-kind n-layered (p) sections demarcated corresponding to the kinds of the resins by the lotus route part.

9. 发明专利

JPH05154822A TRANSFER MATERIAL MADE OF SYNTHETIC RESIN FOR CASTING CONCRETE 失效
公开(公告)号：JPH05154822A
公开(公告)日：1993-06-22
申请号：JP33955191
申请日：1991-11-29
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP , NIPPON STEEL METAL PROD
发明人： OTA AKIRA , KUSHIMA YUKIMASA , YONETANI KIICHI , MATSUI KIYOSHI , TAKANEZAWA YOSHIMITSU
IPC分类号： B28B7/16 , E04G9/10
摘要： PURPOSE:To obtain a transfer material improved in the releasability from cast concrete, capable of being used repeatedly and capable of imparting diversity to a pattern by molding a transfer material applying unevenness to cast concrete into various polygonal shapes using a synthetic resin and combining a plurality of the molded ones having different polygonal shapes in using. CONSTITUTION:Unit pieces having an octagon 1, a tetragon 2, a trapezoid 3 or the like composed of a synthetic resin are combined to be used. A tie bar attaching hole 4 is pref. provided to a unit piece having a specific polygonal shape, for example, a tetragon 2 among them. Further, the unit pieces are pref. molded as hollow bodies by blow molding. By this constitution, tie bars supporting a form are passed through the holes 4 of tetragonal unit pieces 2 to attach the pieces 2 at predetermined positions. Then, octagonal unit pieces 1, trapezoidal unit pieces 3 or the like are fitted in the gaps between the pieces 2 to be fixed. By combining polygonal unit pieces, a change of patterns such that natural stones are embedded can be obtained.

10. 发明专利

JP2001047499A BLOW-MOLDED PRODUCT MADE BY USING MULTILAYER RESIN MOLDING WASTE MATERIAL 失效
公开(公告)号：JP2001047499A
公开(公告)日：2001-02-20
申请号：JP2000155881
申请日：2000-05-26
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP
发明人： OTA AKIRA , IMAMURA SHINJI , KANEDA TSUTOMU
IPC分类号： A01K61/00 , B29C49/00 , C08J5/00 , C08L23/06
摘要： PROBLEM TO BE SOLVED: To simply and inexpensively manufacture a molding having a light weight, high rigidity and long lifetime by recycling a waste material of a multilayer resin blow-molded product containing a highly molecular weight high-density polyethylene and polyamide, and blow molding a thermoplastic resin having a specified ratio of the recycled resin and a specified weight ratio of respective components. SOLUTION: A waste material of a multilayer resin blown molding containing a highly molecular weight high-density polyethylene(HMHDPE) and polyamide(PA) is recycled. A thermoplastic resin containing 70 wt.% of the recycle resin and setting to 3 to 10% of weight ratio of the PA component to the HMHDPE component is blow method, thereby manufacturing a blow-molded product for a fuel tank or the like of an automobile. For example, a float of a culturing raft having a curved surface closed by a groove and a semi-sphere at both ends of a cylindrical part is blow-molded. According to this, the blown molding can be weight-lightened, and lifetime-prolonged. Further, its rigidity and operability can be improved. Its cost can be reduced, and an environmental disruption in association with a damage can be prevented.

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