Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With coupling between charger and mold
Patent
1992-02-06
1994-04-26
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With coupling between charger and mold
425574, B29C 4507, B29C 4520
Patent
active
053061357
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a nozzle touch mechanism for an injection press composite molding machine, and more particularly, to an improvement in a mechanism of the touch between a mold and an injection nozzle.
BACKGROUND ART
A conventional injection press composite molding machine employs either a combination of a horizontal press unit and a vertical injection unit or a combination of a vertical press unit and a horizontal injection unit The former combination has problems in that the height of the machine generally ends up to be rather great and the operability of changing is not favorable. Therefore, the latter combination is more widely used. For example, a molding machine (Japanese Patent Laid-Open No. 61-22917) as shown in FIG. 3 is disclosed. An injection nozzle 32 is placed to abut on a side surface 31a of a fixed mold 31, and a resin passage (a hot runner) 33 is cut through the inside of the mold from a portion to be in contact with the nozzle, and further, a heater 34 is provided around the resin passage. In such a structure, a resin 35 is injected to a cavity (D).
However, the above-described conventional injection press composite molding machine has problems caused by expansion and contraction of the injection unit due to heat. The expanding injection unit pushes and shifts the mold 31, and the contracting injection unit reduces the contact surface pressure between the injection nozzle 32 and the mold 31, resulting in a leakage of the resin. To solve such problems, the present inventor proposes in Japanese Patent Application No. 63-245663 an improvement in which a unit for mounting an injection unit thereon is slidable so that even when the injection unit expands or contracts due to heat, the relation between the injection nozzle and a mold is unchanged. However, this improvement still has problems in that the initial alignment of the nozzle with the mold is difficult and the thermal expansion and contraction of the injection unit is large. To solve the above-mentioned conventional problems, the present invention is directed to provide a nozzle touch mechanism for an injection press composite molding machine, in which even when the injection unit expands or contracts due to heat, the positional relation between the injection nozzle and the mold remains unchanged, and in which initial alignment of the injection nozzle with the mold is easy, and further in which the thermal expansion or contraction thereof is small.
SUMMARY OF THE INVENTION
In a press composite molding machine including: a vertical press unit for opening and closing molds; a horizontal injection unit placed below a die plate of a vertical press unit and having an injection nozzle through which a melted resin is supplied between the molds; a table on which the horizontal injection unit is mounted; an actuator which supports one end of the table and pushes the injection nozzle through a stand and onto one of the molds; and a base which rotatably supports the other end of the table by means of a journal and which is horizontally slidable; a nozzle touch mechanism comprises: an adjusting mechanism which is provided on an upper portion of the stand and with which adjustment is made so that a contact surface of the injection nozzle aligns with a contact portion of one of the molds; and a positioning stopper which faces one end of the base and defines the position thereof.
The adjusting mechanism on the upper portion of the stand comprises a bracket and a plurality of bolts for adjusting the vertical and horizontal positions of the injection nozzle. A lower portion of the stand is fixed to one end of the table by a knock pin. A heat insulating member may be interposed between the plurality of bolts and the injection nozzle which contacts the tips of the bolts. The positioning stopper comprises a bracket and a bolt which faces one end of the base and which defines the horizontal position of the base.
In such a construction, even when the horizontal injection unit whose injection portion is placed under
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Kabushiki Kaisha Komatsu Seisakusho
Leyson Joseph
Woo Jay H.
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