摘要:
A hot chamber die casting machine for casting aluminum and its alloys includes separated ceramic parts, namely a ceramic injection cylinder constituting a pump body, a ceramic outer sleeve, a ceramic injection pipe, and a metallic or thermet flange avoiding a large one piece ceramic body and stress concentrations at critical points. The outer sleeve holds the injection cylinder together with the injection pipe in the molten metal. The flange is fixed to a structure which is outside of and independent from a molten metal container and a heating furnace, thus temperature fluctuations do not affect this injection apparatus. The flange can also be fixed to the structure to which an injection hydraulic cylinder is secured in such a manner that the centers of the hydraulic cylinder, the plunger and the injection cylinder are aligned to perform a stable injection operation. A seal ring is disclosed between no-parallel conical cone shaped-fitting ends between the injection pipe and the injection cylinder. The seal ring can be partially and permanently deformable by a sealing force at the temperature of molten aluminum or its alloy to avoid a stress concentration at the joint.
摘要:
The method for cooling a plunger tip in a die casting machine of the cold chamber type comprises forcibly cooling the inner hollow space in the plunger tip by applying a flow of cooling fluid into and out of the inner hollow space during the time from about the commencement of the injection of the molten metal into the cavity of the moulds of the die casting machine by the forward stroke of the plunger to the commencement of the return stroke of the plunger, and applying, after terminating the application of the cooling fluid to the inner hollow space of the plunger tip, a flow of pressurized gas into and out of the inner hollow space of the plunger tip during the time at least necessary for expelling the remaining cooling fluid from the inner hollow space of the plunger tip so as to prevent excessive cooling and permit the plunger tip to be subjected to uniform natural cooling by the pressurized gas. The device for carrying out the above described cooling of the plunger tip comprises a cooling fluid source and a pressurized gas source, and control means for alternately supplying cooling fluid from the source of the cooling fluid for a predetermined time period and pressurized gas from the source of the pressurized gas for a predetermined time period into the inner hollow space of the plunger tip in timed relationship to the actuation of the stroke of the plunger tip for effecting the die casting cycle of operation.
摘要:
The method of die casting a metallic cast product having a hollow metallic member embedded therein by locating the hollow member in position in a casting cavity and injecting molten metal into the cavity around the hollow member including confining a pressure resisting medium within the interior of the hollow member by seals prior to injecting the molten metal into the cavity, thereby positively preventing the hollow member from being collapsed by the pressure of the molten metal injected into the cavity. The pressure resisting medium is sealingly confined within the hollow member by tightly applying a sealing plug to the respective open ends of the hollow member after the pressure resisting medium completely fills the hollow member. One of the sealing plugs may be movable in response to the increase in the internal pressure of the pressure resisting medium. The movable plug is located in cooperation with a plunger actuated by a fluid actuated cylinder mechanism so as to apply to the movable plug a constant resisting force resisting against the internal pressure of the pressure resisting medium. This permits the movable plug to be moved depending upon the increase in the internal pressure of the pressure resisting medium so as to relieve the internal pressure and prevent the hollow member from being damaged due to the excessive internal pressure of the pressure resisting medium.
摘要:
A method and apparatus for monitoring the operation of a reciprocating liquid injection unit wherein charges of an injection liquid, such as molten metal, are injected one-by-one to a point of consumption, such as an injection molding die, by an injection plunger reciprocating in a sleeve and driven by a double acting hydraulic cylinder and fluctuations in the oil pressure on the return side of the hydraulic cylinder are monitored to detect abnormal increases in such pressure which indicate the occurrence of dragging between the injection sleeve and the plunger head.
摘要:
The present invention provides a banknote storing/feeding device 23 that can increase a storing amount of banknotes while the device is made compact as a whole.The banknote storing/feeding device includes a winding roller 38 that winds and unwinds banknotes together with a tape 37, and a reel 40 that winds and unwinds the tape 37 with respect to the winding roller 38. The banknote storing/feeding device includes a motor 55 including a motor main body 56 disposed inside the winding roller 38, and a first drive axis 58 and a second drive axis 59 projecting from a first end portion side and a second end portion side of the motor main body 56. The banknote storing/feeding device includes a transmission mechanism 70 that transmits a drive force from the second drive axis 59 of the motor 55 to the reel 40. A drive force from the first drive axis 58 of the motor 55 is transmitted to the winding roller 38 to rotate the winding roller 38. A drive force of the second drive axis 59 of the motor 55 is transmitted to the reel 40 to rotate the reel 40.
摘要:
A banknote handling machine for handling banknotes including a windowed banknote that has a window capable of transmitting light formed at a predetermined position comprising: a transport path configured to transport a banknote; a window identification unit configured to judge whether the banknote being transported on the transport path is a windowed banknote; a transport path sensor, which is arranged in the transport path, configured to detect the banknote passing thereon; and a banknote presence/absence detection unit configured to judge a presence or an absence of the banknote associated with a detection signal from the transport path sensor. The banknote presence/absence detection unit performs a detection based on a detection result of the window identification unit.
摘要:
The present invention provides a banknote storing/feeding device 23 that can increase a storing amount of banknotes while the device is made compact as a whole.The banknote storing/feeding device includes a winding roller 38 that winds and unwinds banknotes together with a tape 37, and a reel 40 that winds and unwinds the tape 37 with respect to the winding roller 38. The banknote storing/feeding device includes a motor 55 including a motor main body 56 disposed inside the winding roller 38, and a first drive axis 58 and a second drive axis 59 projecting from a first end portion side and a second end portion side of the motor main body 56. The banknote storing/feeding device includes a transmission mechanism 70 that transmits a drive force from the second drive axis 59 of the motor 55 to the reel 40. A drive force from the first drive axis 58 of the motor 55 is transmitted to the winding roller 38 to rotate the winding roller 38. A drive force of the second drive axis 59 of the motor 55 is transmitted to the reel 40 to rotate the reel 40.
摘要:
A drum rotating device enables a drum and a driving device mounted in the drum to be supported with a simple structure and which reduces the possibility that the driving shaft of the driving device may be offset with respect to the rotation axis of the drum. The drum rotation device includes the drum and the driving device arranged to drive and rotate the drum. The drum includes an outer cylinder, an inner cylinder arranged inside the outer cylinder coaxially therewith, and a support wall arranged to connect the outer and inner cylinders to each other at an approximately intermediate portion in the axial direction. The outer and inner cylinders are substantially cylindrical. The driving device is fixed to a frame at one axial end. The driving shaft of the driving device extends through the drum and is rotatably supported by the frame through a bearing at the other axial end. The driving shaft is arranged to extend through the inner cylinder, thereby being fixedly attached the drum so that the drum and the driving shaft can rotate together.
摘要:
The CPU (31) of a banknote handling machine has a window identification portion (312) which judges whether a banknote is windowed; a presence/absence detection portion (316) which detects presence or absence of the banknote through transport path sensors (PSN); a front/rear end identification portion (317) which judges the passage of the front end portion and the rear end portion of the banknote at positions corresponding to the transport path sensors (PSN); an identification stop portion (315) which stops operation of identifying the passage of the rear end portion at a position corresponding to one of the transport path sensors (PSN) by the front/rear end identification portion (317), for a preset identification stop period (LS) from the time when the absence of the banknote is detected, in the case where the presence/absence detection portion (316) detects the absence of the banknote after the front/rear end identification portion (317) judged that the front end passed the position corresponding to one of the transport path sensors (PSN), on the basis of a identification result obtained from the window identification portion (312); and an abnormal transport judgment portion (318) which judges whether there is abnormal transport of the banknote on the basis of the identification result obtained from the front/rear end identification portion (317).
摘要:
In addition to storing cassettes (16a) to (16f) that store banknotes that are dispensed when money is normally dispensed, a bait money storing portion (14) is provided that stores bait money serving as an emergency banknote to be dispensed in case of an emergency. When the bait money is requested to be dispensed in case of an emergency, the bait money is forcibly transported from the bait money storing portion (14) to a banknote outlet, with the result that the bait money is dispensed quickly.