| 摘要 |
A small sized injection molding machine by which a molded product can be produced with a desired level of precision with simple control. An injection molding machine with: a longitudinal injection cylinder to which stick-shaped molding materials are sequentially supplied in line from the upper side, the lower end of which is formed into a nozzle shape, and the lower side of which is constituted by a material having a good heat retaining property; a heater which heats the lower portion of the injection cylinder; and a pressing shaft which presses the stick-shaped molding materials downward. When the stick shaped-molding material located at the uppermost side is pressed by the pressing shaft, the molding material located at the lowermost side which has already been completely melted, is injected into a cavity, and the heat from the heater is transmitted to the die side through a nozzle touch portion. |
| 主权项 |
1. An injection molding apparatus comprising:
a mold including a lower-side mold and an upper-side mold forming a cavity with the lower-side mold; a vertical injection cylinder having a nozzle in a lower end, to which stick-shaped molding materials are sequentially supplied in line from the upper side; a heating means generating a temperature gradient in which the temperature increases from above to below inside the injection cylinder, thus changing sequentially the molding material supplied in the injection cylinder from solidification to a completely molten state; and a push-in means including a push-in shaft pushing the stick-shaped molding materials downward in the injection cylinder, wherein, when the stick-shaped molding material in the highest level is pushed by the push-in shaft, the molding material in the lowest level, which has been completely molten, is injected, while utilizing the effect of an airtight stopper due to a half-molten state of the stick-shaped molding material in a middle level, to the cavity, and heat is transmitted from the injection cylinder to the mold through a nozzle touch from the nozzle. |
