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1. 发明专利

JPH11227014A INJECTION MOLDING MACHINE AND METHOD FOR MOLDING 失效
公开(公告)号：JPH11227014A
公开(公告)日：1999-08-24
申请号：JP2946298
申请日：1998-02-12
申请人： HITACHI LTD
发明人： WADA KIYOSHI , MURAKAMI TAKANARI
IPC分类号： B29C45/64 , B29C45/80
摘要： PROBLEM TO BE SOLVED: To obtain a molding of a high accuracy by detecting an interval between a fixed die plate and a movable die plate at a plurality of positions, setting the intervals of the respective positions to a predetermined value, and controlling the interval therebetween. SOLUTION: Die plate interval detectors 16a to 16d respectively detect intervals between a fixed die plate and a movable die plate at four positions. A die plate interval setter 17 sets predetermined relative compared values of the four die plate intervals. A die plate interval controller 18 compares the interval previously set by the setter 17 with the intervals detected by the detectors 16a to 16d, calculates correction amounts of the intervals of the respective positions, and sends signals to four nut clamping regulating mechanisms 15a to 15d. The mechanisms 15a to 15d clamp or loosen fixed die plate clamping nuts 14a, 14b corresponding to signals from the controller 18.

2. 发明专利

JPH10286858A INJECTION MOLDING DEVICE 失效
公开(公告)号：JPH10286858A
公开(公告)日：1998-10-27
申请号：JP9552897
申请日：1997-04-14
申请人： HITACHI LTD
发明人： WADA KIYOSHI , GOTO NORIO , OZAWA MASAHIKO , ENDO TOSHIRO , MURANAKA MASAYUKI
IPC分类号： B29C45/26 , B29C45/78 , B29C45/80
摘要： PROBLEM TO BE SOLVED: To reduce the ununiform mold-opening during a molding process, and consequently obtain a highly accurate molded article by a method wherein a thickness adjusting part is provided in a mold and divided into a plurality of zones sot as to adjust the thickness of each portion by means of temperature or the like. SOLUTION: In a thickness adjusting part 31, temperature adjusting parts 41, 42, 43... and temperature detecting parts 51, 52, 53... are assembled. For example, the thickness adjusting part 31 is divided into nine zones. In respective zones, the temperature adjusting parts 41-49 and the temperature detecting parts 51-59, which make pairs with the temperature adjusting parts so as to detect the temperature of the zones, are assembled. The temperature adjusting parts 41-49 and the temperature detecting parts 51-59 are connected with a temperature controlling part 61 so as to realize the controllings of the temperatures of the respective zones to predetermined temperatures. The pre-settings of the temperatures of the respective zones can be possible at the temperature controlling part 61. As the temperature adjusting parts 41-49, heaters, which performs their heating through the turning ON and OFF of signals sent from temperature controlling part 61, are employed for adjusting the temperatures of the zones.

3. 发明专利

JPH1024494A PHOTO-SHAPING DEVICE 失效
公开(公告)号：JPH1024494A
公开(公告)日：1998-01-27
申请号：JP18039196
申请日：1996-07-10
申请人： HITACHI LTD
发明人： OZAWA MASAHIKO , GOTO NORIO , WADA KIYOSHI , ENDO TOSHIRO , MURANAKA MASAYUKI
IPC分类号： B29C35/08 , B29C67/00 , B29K105/24
摘要： PROBLEM TO BE SOLVED: To save waste of light irradiation time consumed for forming the holding portions by a method wherein a plurality of holding parts for holding a model are provided in advance to a device and, in addition, a means for moving the holding parts to the direction of lamination and a means for individually controlling the movements are provided. SOLUTION: A photo-shaping system controlling circuit 5 makes an action map 10 for moving a moving means 4 from the position of a model holding part 3, on which a flag is up, from the relationship among the position of the model holding part 3, on which the flag is already up, contour drawing data 13 read-in anew and the arrangement data 6 of model holding parts 3. In response to the action map 10, the moving means 4 sinks the model holding part 3 locating at the position the flag is up further deeper below the liquid level of photosetting resin 1 by the lamination pitch and reads the contour drawing data 13 of the third layer. By repeating the actions as mentioned above, a model is produced. Thus, the time for producing the holding portions by light can be saved, resulting in realizing a high speed shaping.

4. 发明专利

JPH09277326A METHOD AND EQUIPMENT FOR INJECTION MOLDING 失效
公开(公告)号：JPH09277326A
公开(公告)日：1997-10-28
申请号：JP9221696
申请日：1996-04-15
申请人： HITACHI LTD
发明人： WADA KIYOSHI , GOTO NORIO , OZAWA MASAHIKO , ENDO TOSHIRO , MURANAKA MASAYUKI
IPC分类号： B29C33/38 , B29C45/26 , B29C45/46 , B29C45/77 , B29C45/84 , B29C67/00 , B29K105/24
摘要： PROBLEM TO BE SOLVED: To provide a method for injection molding which enables prevention of deformation or breakdown of a molding tool and attainment of an excellent molded article on the occasion when the tool is manufactured by an optical molding technique and the injection molding is conducted by using the tool. SOLUTION: The pressure of resin filled in a molding tool or a pressure loaded on the molding tool is detected by a pressure detecting means 13. A prescribed pressure enabling prevention of deformation or breakdown is inputted beforehand to a pressure computing device 14, the pressure of the filled resin is compared with the inputted prescribed pressure and injection is controlled so that the resin pressure may not exceed a prescribed value.

5. 发明专利

JPH09201878A OPTICALLY SHAPED PRODUCT AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH09201878A
公开(公告)日：1997-08-05
申请号：JP1363096
申请日：1996-01-30
申请人： HITACHI LTD
发明人： WADA KIYOSHI , GOTO NORIO , OZAWA MASAHIKO , ENDO TOSHIRO , MURANAKA MASAYUKI
IPC分类号： G03F7/20 , B29C33/38 , B29C35/08 , B29C64/135 , B29C64/379 , B29C67/00 , B29K105/24
摘要： PROBLEM TO BE SOLVED: To obtain many highly precise molded products by preventing breakdown of a mold by a method wherein a reinforcing part is inserted into a setting material before the setting material is thoroughly set, and thereafter the setting material is set by being stuck close to the reinforcing part to prepare a shaped product. SOLUTION: A projected part 11a is provided to a prepared setting material 11, and shaping is carried out by providing a space 11b near thereby. A reinforcing part 14 is inserted into the space 11b of the shaped material 11 of a half set state. Thereafter, the UV shaped material 11 is irradiated with UV rays 16 by an UV lamp 15. At that time, unset resin on a surface of the space 11b of the shaped material 11 is stuck close to a surface of the reinforcing part, and set. Therefore, since the shaped material 11 sticks close to the reinforcing part 14, they are not easily separated from each other. Thus, a shaping mold 11 wherein strength is improved by inserting the reinforcing part 14 near the projected part 11a of low strength can be manufactured.

6. 发明专利

JPH07227882A INJECTION MOLD AND INJECTION MOLDING METHOD 失效
公开(公告)号：JPH07227882A
公开(公告)日：1995-08-29
申请号：JP2085694
申请日：1994-02-18
申请人： HITACHI LTD
发明人： WADA KIYOSHI , TANIDE HIDEO
IPC分类号： B29C33/38 , B29C45/26 , B29C45/56 , B29L11/00
摘要： PURPOSE:To maintain a temperature distribution at molding in a rotational symmetry so as to mold a rectangular lens with a high precision by providing a cavity for molding the rectangular lens, an auxiliary cavity which becomes almost a circle when it is fit to the cavity, and a gate for connecting the cavity and the auxiliary cavity to each other. CONSTITUTION:A resin melted in a molding machine is passed through a sprue 9, a runner 8, and a gate 7 so as to charge a cavity 6 with it. The resin is further passed through an auxiliary gate 14 so as to charge an auxiliary cavity 13 with it. Heat of a fixed mold 1 and a movable mold 2 is exchanged for heat of a temperature adjusting medium which passes the molds, and each resin is cooled. At that time, as the space between the cavity 6 and the auxiliary cavity 13 is small, the resin is cooled in the same manner as in the case the whole is one circular cavity. That is, the inner temperature of the resin is cooled in a state that a rotational symmetry is retained. Thereafter, the fixed mold 1 and the movable mold 2 are separated from each other, an extrusion board 10 is moved within a space 11 and an extrusion bar 10a is moved, a lens is connected at the auxiliary gate 14 and protruded.

7. 发明专利

JPH0764042A EXTREMELY WIDE-ANGLE LIQUID CRYSTAL PROJECTOR SYSTEM 失效
公开(公告)号：JPH0764042A
公开(公告)日：1995-03-10
申请号：JP20906493
申请日：1993-08-24
申请人： HITACHI LTD , SEGA ENTERPRISES KK
发明人： TANIDE HIDEO , MURANAKA MASAYUKI , MORI SHIGERU , WADA KIYOSHI , YOSHIZAKI ISAO , OGURA NAOYUKI
IPC分类号： G02B21/00 , G02F1/13 , G02F1/1335 , H04N5/74
摘要： PURPOSE:To make a space occupied by a system small at a projection time, to make the system suitable for industrial production and to enable a video having presence to be enjoyed by using a projection lens provided with the curvature of field almost conforming with the shape of a screen and a projection angle being >=120 deg. as the projection lens. CONSTITUTION:Light from a light source 1 is condensed on a liquid crystal panel 3 by a lens 2 and a video signal transmitted to the panel 3 is projected on the panel 3. Then, the video thereof is fetched to the projection lens 6, enlarged and projected on the dome-like screen 7. By using the projection lens 6 such as a fisheye lens provided with the curvature of field almost conformed with the shape of the screen and the projecting angle being >=120 deg., for example, the wide projecting angle being >=120 deg. is obtained and the large video (equal to or more than a 100 inch-class) is obtained by a shorter distance than a distance between a conventional projection lens whose projecting angle is small and the screen (3-4m). Therefore, a space used for enlargement and projection can be made small and the space occupied by the system at the projecting time is made small.

8. 发明专利

JPH0614284A REAR PROJECTION TYPE PICTURE DISPLAY DEVICE 失效
公开(公告)号：JPH0614284A
公开(公告)日：1994-01-21
申请号：JP16868192
申请日：1992-06-26
申请人： HITACHI LTD
发明人： WADA KIYOSHI , YOSHIKAWA HIROKI , YOSHIDA TAKAHIKO , OSAWA ATSUO , WATANABE TOSHIMITSU
IPC分类号： H04N5/74
摘要： PURPOSE:To require small space for installation and to lift it by oneself to an installation place. CONSTITUTION:The size of a screen 2 is of 35 inches in the diagonal. The projection distance of a lens block 4 is 560mm at the time of projection when the diagonal is 35 inches. Respective parts in the display device is arranged in high density. A mirror 3 and a box body 9 or the like are made of plastic. The display device is of 350mm under 400mm in depth and is of 35kg under 40kg in weight.

9. 发明专利

JPH05208848A PRODFUCTION OF OPTICAL PART 失效
公开(公告)号：JPH05208848A
公开(公告)日：1993-08-20
申请号：JP1474492
申请日：1992-01-30
申请人： HITACHI LTD
发明人： MURANAKA MASAYUKI , WADA KIYOSHI , HIRATA KOJI , SATO KOZO
IPC分类号： C03C15/00 , C25F3/14 , G02B3/00 , G03B21/62 , G03B21/625 , G03F7/40
摘要： PURPOSE:To obtain the subject large-sized optical part having a nearly microlens group at a low cost with good productivity by forming a desired resist pattern in contact with a substrate to be etched, etching the substrate to be etched and then removing the resist. CONSTITUTION:A substrate 20 to be etched is provided with a resist 11 of a desired pattern in contact therewith and then dissolved (30; an etching solution, 40; an etching vessel) by chemical reaction, dissolved by electrochemical reaction and/or etched by a physical means. The resist 11 is subsequently removed (60; a resist stripping agent, 61; a resist stripping vessel) to afford the objective optical part 50 having a microlens group 51.

10. 发明专利

JPH0566481A TRANSMISSION TYPE SCREEN AND ITS HOLDING METHOD AND REAR PROJECTION TYPE PICTURE DISPLAY DEVICE USING IT 失效
公开(公告)号：JPH0566481A
公开(公告)日：1993-03-19
申请号：JP23003691
申请日：1991-09-10
申请人： HITACHI LTD
发明人： WADA KIYOSHI , YOSHIDA TAKAHIKO , YOSHIKAWA HIROKI , HIRATA KOJI , MURANAKA MASAYUKI , YOSHIZAKI ISAO
IPC分类号： G03B21/62 , H04N5/74
摘要： PURPOSE:To obtain a transmission type screen and its holding method in which a waviness phenomenon is prevented from occurring even in the case of a thin screen and by which a high-quality picture is always projected. CONSTITUTION:Thesile force using the elastic force of an elastic member such as another curved lens sheet 2b or a spring is given to a lens sheet 2a which constitutes the transmission type screen 2. Thus, a rear projection type picture display device 1 where the high-quality picture is always projected and the waviness phenomenon is prevented from occurring even in the case of the thin screen 2.

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