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Resin material supply apparatus for resin press molding machine
| Details |
Inventors: Takeuchi, Naoki;
Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe, JP)
Primary Examiner: Woo; Jay H.
Assistant Examiner: Smith; Duane S.
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt
The present invention has a purpose to prevent leakage of resin material and disorder of cutting operation without increasing plate thickness of the cutter, thereby providing a resin material supply apparatus capable of suiting increase of resin material sheet size or higher back pressure. To this end, according to the present invention, there is provided a resin material supply apparatus and method for a resin press molding machine in which: resin material is extruded in a supply cylinder toward a die by a piston, and the molded resin material is cut by a cutter which slides along a front end surface of the die. Then, the cut resin material is supplied onto a metal mold, and new resin material is charged into the supply cylinder by pressing the cutter toward the die at a position that the cutter closes an opening of the die. |
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DETAILED DESCRIPTION The present invention has a purpose, in view of above conventional problems, to prevent leakage of resin material and disorder of cutting operation without increasing plate thickness of the cutter, thereby providing a resin material supply apparatus capable of permitting increase of resin material sheet size or higher back pressure.
To this end, according to a first aspect of the present invention, there is provided a resin material supply method for a resin press molding machine comprising steps of: extruding resin material in a supply cylinder toward a die by a piston; cutting the molded resin material by a cutter which slides along a front end surface of the die; supplying the cut resin material onto a metal mold; and charging new resin material into the supply cylinder by pressing the cutter toward the die at a position that the cutter closes an opening of the die.
Further, according to a second aspect of the present invention, there is provided a resin material supply apparatus for a resin press molding machine comprising a supply cylinder for extruding resin material toward a metal mold by a piston; a die having an opening for forming the resin material extruded from the supply cylinder; a cutter device having a cutter cutting the molded resin material by sliding along a front end surface of the die; a charger for charging resin material into the supply cylinder; and a pressing device pressing the cutter toward the die at a position that the cutter closes the opening of the die.
With this arrangement and method, after the resin material is supplied onto the metal mold, the cutter of the cutter device is slid along the front end surface of the die 9 so that the resin material 4 is cut by this cutter 21.
Then, after this cutting operation, the resin material 4 is charged into the supply cylinder 7 by the charge device 11.
In this case, the pressing device 36 presses the cutter toward the die to firmly close the opening of the die.
By pressing the cutter by means of the cutter device, it becomes capable of preventing occurrence of gaps or leakage of resin material even when the resin material is charged by higher back pressure as well as preventing disorder in cutting operation generated based on the leakage of the resin material
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