Plastic article or earthenware shaping or treating: apparatus – Preform assembly means and means for bonding of plural... – Means press fitting or forcibly embedding one preform into...
Patent
1989-07-25
1991-01-08
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
Preform assembly means and means for bonding of plural...
Means press fitting or forcibly embedding one preform into...
425525, 425577, B29C 4920
Patent
active
049831160
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE ART
This invention relates to a molding machine which can secondarily injection-mold a handle, a base cup and the like on a synthetic resin hollow product such as a blow-molded bottle.
BACKGROUND
An injection blow molding machine capable of primarily injection molding a base cup on a bottom of a thin-wall synthetic resin container oriented blow molded has been already known from Japanese patent application Laid-Open Publication No. 58-194520.
The above molding machine is designed so that a hollow molded product such as a bottle oriented blow molded is moved, without being removed from a transfer plate, to a secondary molding mold provided adjacent to a blow molding mold, and an internal pressure is applied under the attitude of the product oriented blow molded to inject a base cup.
A secondary molding of a handle to a hollow molded product oriented blow molded is disclosed in Japanese patent application Laid-Open Publication No. 62-181130. Also in this molding method, an internal pressure is applied to a hollow molded product to injection mold a handle on a thin-wall body portion but this application discloses no apparatus required for molding.
It is convenient to carry out the secondary molding of a handle or the like while holding a hollow molded product on the side of a transfer plate as in the above-described molding machine in terms of supplying a hollow molded product to a secondary molding mold. A relative position between a hollow molded product as a member to be molded and a secondary molding mold can be easily coincided. In this case, however, a series of operations comprising injection molding of a parison, orientation blow molding of a hollow molded product and secondary molding are continuously carried out. Therefore, this system can be employed for a molding method generally called a hot parison system but cannot be employed for a cold parison system in which a molded parison is orientation blow molded later by other apparatus.
Problems encountered in the case where a handle or the like is injection molded to a hollow molded product after removal from an orientation blow molding machine lie an insert of a hollow molded product into a mold, and a connection between an air blowing device for applying an internal pressure and a hollow molded product. It is therefore desirable to develop a secondary injection molding machine which is easy for insertion, which can positively provide a connection between a hollow molded product within the mold and a blow core, and which can supply an internal pressure enough to withstand an injection pressure into a hollow molded product.
DISCLOSURE OF THE INVENTION
Accordingly, this invention has been achieved in view of the aforementioned circumstances. An object of this invention is to provide a secondary injection molding machine for inserting a hollow molded product such as a bottle made of synthetic resin into a secondary molding mold to secondarily injection mold a handle on a body portion or a base cup or the like on a bottom portion thereof, in which the insertion of a hollow molded product into a secondary molding mold can be smoothly done and pressing of a hollow molded product within the mold by air pressure can be positively carried out.
For achieving the aforesaid object, this invention provides a secondary injection molding machine comprising a rotational member provided movably up and down on a column on the machine bed, an insert mechanism comprising a lateral molded-product holding device mounted on the rotational member, a vertical clamping mechanism positioned adjacent to the insert mechanism and having an upper clamping plate which is vertically moved for opening and closing a mold connected to the rotational member, a secondary molding mold mounted on the clamping mechanism so that the secondary molding mold is opened and closed up and down, an injection device on the machine bed disposed horizontally with respect to :he clamping mechanism, and an air blowing device positioned on the side of the column and connected to the
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patent: 4299371 (1981-11-01), Duga
patent: 4303381 (1981-12-01), Aoki
patent: 4727997 (1988-03-01), Nakamura et al.
Chiesa Richard L.
Nissei ASB Machine Co. Ltd.
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