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1. 发明专利

JP2001162650A METHOD AND APPARATUS FOR MANUFACTURING SANDWICH FOAM 失效
公开(公告)号：JP2001162650A
公开(公告)日：2001-06-19
申请号：JP34949099
申请日：1999-12-08
申请人： JAPAN STEEL WORKS LTD
发明人： YAMACHIKA MITSUAKI , OYABU HIDEO , EMI TORU
IPC分类号： B29C45/16 , B29C45/00 , B29C45/13 , B29C45/60 , B29K105/04 , B29L9/00
摘要： PROBLEM TO BE SOLVED: To manufacture a sandwich foam having a non-foamed skin layer with a predetermined thickness on its surface and having a fine cellular structure therein though a physical foaming agent is used. SOLUTION: Main and auxiliary injection units 1, 10 are used. A material is plasticized by the auxiliary injection unit 1 and inert gas in a supercritical state is injected to be dissolved throughout the material to obtain a foamed molten resin for a core layer (CHJ) which is, in turn, stored in the main injection unit 10 while back pressure is applied to the molten resin. Thereafter, a molten resin for a skin layer (SJ) is weighed by the auxiliary injection unit 1 and injected in a cavity 25 by the auxiliary injection unit 1 and the foamed molten resin for the core layer (CHJ) is subsequently injected by the main injection unit 10 to obtain a sandwich foam S having a non-foamed skin layer with a predetermined thickness on its surface and having fine cells therein.

2. 发明专利

JPH0533885B2 失效
公开(公告)号：JPH0533885B2
公开(公告)日：1993-05-20
申请号：JP29598588
申请日：1988-11-25
申请人： JAPAN STEEL WORKS LTD
发明人： YAMACHIKA MITSUAKI
IPC分类号： B29C45/16 , B29C45/20 , B29C45/23 , B29L9/00

3. 发明专利

JPH0478450B2 失效
公开(公告)号：JPH0478450B2
公开(公告)日：1992-12-11
申请号：JP29598388
申请日：1988-11-25
申请人： JAPAN STEEL WORKS LTD
发明人： YAMACHIKA MITSUAKI
IPC分类号： B29C45/13 , B29C45/16 , B29C45/20 , B29C45/23 , B29C45/26

4. 发明专利

JP2002355880A KNEADING/DEVOLATILIZING EXTRUSION MOLDING APPARATUS UTILIZING SUPERCRITICAL FLUID 失效
公开(公告)号：JP2002355880A
公开(公告)日：2002-12-10
申请号：JP2001163635
申请日：2001-05-31
申请人： JAPAN STEEL WORKS LTD
发明人： FUKUSHIMA TAKESHI , TOMIYAMA HIDEKI , YAMACHIKA MITSUAKI , EMI TORU
IPC分类号： B29B7/48 , B29B7/84 , B29C47/40 , B29C48/76 , B29K101/00 , B29C47/76
摘要： PROBLEM TO BE SOLVED: To gasify a supercritical fluid from a molten molding compound impregnated with the supercritical fluid while suppressing the deterioration of a polymer and the re-flocculation of a filler to certainly devolatilize the same. SOLUTION: The kneading/devolatilizing extrusion molding apparatus is equipped with a devolatilizing twin-screw extrusion molding machine E for gasifying the supercritical fluid in the molten molding compound impregnated with the supercritical fluid discharge from a discharge pipeline 25 to separate and remove the same and subsequently extruding the molding compound. The devolatilizing twin-screw extrusion molding machine E is constituted so that a supply port 3 provided with a pressure control means 11 is provided to a cylinder 1 on the upstream side thereof, and a downstream open vent port 6a, a first forcible exhaust vent port 7a and a second forcible exhaust vent port 7b are successively provided between the supply port 3 and a die 4 from an upstream side and an upstream open vent port 6b is provided to the upstream region of the supply port 3. A first weir part 5a is provided to the screw 2 in the vicinity of the upstream region of the first forcible exhaust vent port 7a and a second weir part 5b is provided in the vicinity of the upstream region of the second forcible exhaust vent port 7b.

5. 发明专利

JP2002028963A METHOD AND APPARATUS FOR EXTRUSION MOLDING OF FOAM 失效
公开(公告)号：JP2002028963A
公开(公告)日：2002-01-29
申请号：JP2000214288
申请日：2000-07-14
申请人： JAPAN STEEL WORKS LTD
发明人： YAMACHIKA MITSUAKI , EMI TORU , FUKUSHIMA TAKESHI
IPC分类号： B29C47/10 , B29C47/36 , B29C47/40 , B29C48/92 , B29K101/12 , B29K105/04 , B29C47/92
摘要： PROBLEM TO BE SOLVED: To provide a method for extrusion molding of a foam by which foaming from a bung hole for carbon dioxide fluid to a die is suppressed, degree of the foaming can be adjusted, and a fine foam with high quality can be continuously obtained. SOLUTION: A resin material is melted by a double-screw extruder 1 and carbon dioxide fluid under supercritical condition is injected into a molten resin to obtain a foaming material. This is pressurized by means of a gear pump 30 and is extruded into open atmosphere from the die 35 to obtain the foam by releasing the pressure at a stroke. In this case, as a screw for a part Y for dissolution, diffusion and penetration of the carbon dioxide fluid, a full flight screw is used. In addition, degree of melting and kneading of the resin material is adjusted by slide gates 13 and 13' and the carbon dioxide fluid is prevented from flowing backward. A space between the slide gates and the gear pump also takes an effect like an action of a chamber by a synergistic action of the slide gates, the full flight screw and the gear pump.

6. 发明专利

JP2001162649A METHOD AND APPARATUS FOR MANUFACTURING SANDWICH FOAM 失效
公开(公告)号：JP2001162649A
公开(公告)日：2001-06-19
申请号：JP34903199
申请日：1999-12-08
申请人： JAPAN STEEL WORKS LTD
发明人： YAMACHIKA MITSUAKI , OYABU HIDEO , EMI TORU
IPC分类号： B29C45/16 , B29C45/00 , B29C45/70 , B29C48/395 , B29C47/38
摘要： PROBLEM TO BE SOLVED: To manufacture a sandwich foam having no sink or warpage on its surface, excellent tin surface appearance and having uniform foamed cells through the thickness of the foamed object is large by using a recycled plastic material. SOLUTION: A molten resin for a core layer in which a fluid of carbon dioxide is dissolved is obtained from a recycled plastic material by an extruder and stored in a first injection plunger device. A molten resin of r a skin layer is stored in a second injection plunger device and injected in a cavity and, subsequently, the molten resin for the core layer is injected in the cavity from the first injection plunger device and foamed to obtain a sandwich foam of which the surface comprises a solid resin.

7. 发明专利

JPH0571373B2 失效
公开(公告)号：JPH0571373B2
公开(公告)日：1993-10-07
申请号：JP22928689
申请日：1989-09-06
申请人： JAPAN STEEL WORKS LTD
发明人： YAMACHIKA MITSUAKI
IPC分类号： B29C45/16 , B29C45/20 , B29C45/74

8. 发明专利

JPH0549449B2 失效
公开(公告)号：JPH0549449B2
公开(公告)日：1993-07-26
申请号：JP11867490
申请日：1990-05-10
申请人： JAPAN STEEL WORKS LTD
发明人： YAMACHIKA MITSUAKI
IPC分类号： B29C45/20 , B29C45/16 , B29C45/23

9. 发明专利

JPH03272821A INJECTION HEAD 失效
公开(公告)号：JPH03272821A
公开(公告)日：1991-12-04
申请号：JP11867490
申请日：1990-05-10
申请人： JAPAN STEEL WORKS LTD
发明人： YAMACHIKA MITSUAKI
IPC分类号： B29C45/20 , B29C45/16 , B29C45/23
摘要： PURPOSE:To make excessive molding time and labor unnecessary, while molding operation is simplified by a method in which first and second injection units are communicated with the outer and inner paths of an injection head-body, and the advance and retreat of an inner torpedo are carried out by way of a center shaft. CONSTITUTION:After the plasticizing operation of first and second injection units 15, 16, the second injection unit 16 is stopped. The injection operation of the first injection unit 15 is started and is continued. When an inner torpedo 3 is retracted and is stopped at most retracted position, an outer path 8 is opened and an inner path 9 is closed. The molten resin which molds a skin layer is injected into a molding from the first injection unit 15. When the injecting operation of the second injection unit 16 is started, the molten resin in a core layer is injected into the inner path 9, thereby advancing the inner torpedo 3. The inner path 9 is opened and the molten resin which flows in both paths 8, 9 is injected into the mold, while the core layer is fully enclosed with a skin layer. At the state where the inner torpedo 3 is retracted to most retracted position, and the inner path 9 is closed, molten synthetic resin is injected into the outer path 8 from the first injection unit 15 and is injected into the mold, whereby single molding is carried out.

10. 发明专利

JPH03147821A FLUID INJECTION MOLDING METHOD USING TWIN INJECTION MOLDING MACHINE 失效
公开(公告)号：JPH03147821A
公开(公告)日：1991-06-24
申请号：JP28756989
申请日：1989-11-06
申请人： JAPAN STEEL WORKS LTD
发明人： YAMACHIKA MITSUAKI
IPC分类号： B29C45/13 , B29C45/16 , B29C45/18
摘要： PURPOSE:To facilitate the flow rate of molten resin and control of pressure by closing two passages and plasticization-operating separative injection units passed respectively through the two passages and then filling a large amount of molten resin into a mold in a short period. CONSTITUTION:A first injection unit 15 is injection-driven by a first cylinder 15b and the first screw 17a of a first injection cylinder 17 inserted thereinto and constituted of a first screw 15a which is rotated for plasticization by means of a first plasticization driving device, and a second injection unit 16 is injection- driven by a second cylinder 16b and the second piston 18a of a second injection cylinder 18 inserted thereinto and constituted of a second screw 16a which is rotated for plasticization by means of a second plasticization driving device. By moving and stopping an inside torpedo 3 as opening and closing means for the two passages to an arbitrary position between the utmost forward position and utmost rearward position in the axial direction, a twin injection molding machine is constituted such that an outside passage 8 and inside passage 9 as two passages can be opened and closed freely and the first and second injection units 15, 16 can be drive-controlled independently.

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