Maro Publications

Blow Molding

Patents with Abstracts

*7/3/2014  
from 6/12/2013

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Patent Abstracts

6. 8,287,797 
Electrically driven blow molding machine
 
Voth, Blochmann and Winzinger  of Krones AG, Germany, developed a device for molding plastic preforms into plastic containers with a blow mold and closures interacting with one another in order to transfer the blow mold between an open state and a closed state.  The blow mold forms a cavity, within which the plastic preforms may be expanded into the plastic containers.  The closure members comprise at least one first mold part and one second mold part, which are moveable with respect to one another.  The closure members further contains a blow nozzle unit which is moveable with respect to the mold parts, and which closes the blow mold in the closed state in one direction.  At least one first drive unit moves the mold parts with respect to one another. A second drive unit moves the blow nozzle unit with respect to the mold parts. At least one drive unit moving at least one of the closure members for transferring the blow mold between the closed state and the open state includes an electric drive unit. (RDC 10/31/2012)

5. 8,287,796 
Method for producing hollow bodies from thermoplastic material, and device for producing hollow bodies from thermoplastic material
 
Buchholz et al of Kautex Textron GmbH & Co. KG, Germany, produced hollow bodies from thermoplastic material in which web- or strip-type preforms of plasticised plastics material are shaped in a multi-part tool which forms a mould nest, with two outer moulds and a central mould which perform opening and closing movements with respect to one another.  The central mould is provided with at least one device for receiving and manipulating components to be fastened in the interior of the hollow body by means of a material and/or form-fitting joint.  Prior to the fastening of the components to the inner wall of the hollow body to be produced, the components are heated by means of a radiant heating device.  The radiant heating device is integrated in the central mould of the tool. (RDC 10/31/2012)

4. 8,283,007 
Blow molded receptacle and system for making same
 
Knappe, Koranda and Grinnall of Custom-Pak, Inc., Iowa, developed a system for making blow molded receptacles based on two mold portions that, when positioned adjacent each other, at least partially enclose a cavity defined by a molding surface, against which the walls of a blow molded receptacle are blown.  One of the portions is a mold core, which has a base surface and a raised portion extending out from the base surface into the cavity.  The raised portion has an outer surface and a side surface, which results in a corresponding, inner sidewall on the blow-molded receptacle.  The raised portion houses a punch partly disposed in an opening in the side surface for punching a hole in the sidewall. In some embodiments, the side surface is substantially perpendicular to the seal between the two mold portions, and an actuator displaces the punch in a direction substantially parallel to the seam. (RDC 10/16/2012)

3. 8,257,076 
Multi-rod structure for opening and closing molds
 
Tsay, Chen and Chen of National Sun Yat-Sen University, Taiwan, developed a multi-rod structure for opening and closing molds of a bottle blow molding system.  It includes a single cam, a first side connection rod assembly located on a first side of the cam and having a first side triple connection rod, a first mold actuated by the first side triple connection rod, a linkage connection rod, a second side connection rod assembly located on a second side of the cam and having a second side triple connection rod actuated by the linkage connection rod, and a second mold actuated by the second side triple connection rod.  The multi-rod structure only uses the single cam to simultaneously actuate the first and second molds, so that the structure can be simplified, while the vibration, loading, noise and abrasion of components during operation can be relatively reduced. (RDC 9/7/2012)

2. 8,192,677 
Core/shell polymer and fluoropolymer blending blow molding and blown film process
 
Aten, Libert and Burch of DuPont, Delaware, developed a process for extruding a partially crystalline melt-fabricable perfluoropolymers.  The process consists of blow molding from a perfluoropolymer having polytetrafluoroethylene sub-micrometer particles dispersed therein. The perfluoropolymer composition is a core/shell polymer, with pelletized blend, a dispersion blend or a melt-mixed polymer.  (RDC 6/18/2012)

1. 8,186,993 
Blow mold, especially for producing a mannequin
 
Liu, China, developed a blow mold for a mannequin with a model cavity having a profile, an inserting part, and a drive device.  The inserting part is disposed on the model cavity, a modeling surface is disposed in the front of the inserting part, and operates to form a part of the profile of the model cavity, an angle between the molding surface of the inserting part and the profile of the model cavity is 90 degrees, a gap is disposed between the model cavity and the inserting part, a protruding portion is disposed on the molding surface of the inserting part and faces towards the inside of the model cavity, the inserting part is connected to the drive device, and the drive device operates to drive the inserting part to move towards the model cavity before blow molding, and to reset the inserting part after blow molding.  (RDC 6/4/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

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E-Mail: cornelrd@bee.net  

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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 6/4/2012.