Abstract:
Die Erfindung betrifft ein Streckblasverfahren zur Herstellung eines Kunststoffbehälters aus einem Preform (11), aufweisend einen länglichen, röhrenförmigen, sich entlang einer Mittelachse (12) des Preforms (11) erstreckenden Preformkörper (21) mit einem ersten Ende (23) und einem dem ersten Ende (23) im Wesentlichen gegenüberliegenden zweiten Ende (25), wobei das erste Ende (23) durch einen Preformboden verschlossen ist und sich an das zweite Ende (25) ein Halsteil (31) mit einer Ausgiessöffnung (35) anschließt, und mit einer einen Innenraum (19) des Preforms (11) begrenzenden Wandung (13) mit einer Innenseite (17) und einer Aussenseite (15). Beim Verfahren wird der Preformkörper (21) auf mindestens 70° Celsius erwärmt und in eine Kavität einer Blasform eingebracht. Ein Reckdorn mit einem Reckdornkörper und einer Reckdornspitze wird in den Preform (11) eingefahren, bis die Reckdornspitze den Preformboden (23) erreicht. Dann wird der Preformkörper (21) und der Preformboden (23) durch den Reckdorn in die Kavität hinein gestreckt und anschliessend wird der Preformkörper (21) und der Preformboden (23) durch Einbringen eines Fluids in den Preform (11) unter Druck gemäss der Kavität verformt. Der Reckdorn berührt dabei, während er in den Preform (11) eingefahren wird bis er den Preformboden (23) erreicht, die Innenseite (17) der Wandung (13) im Bereich des Preformkörpers (21) an wenigstens einem vorbestimmten Teilbereich.
Abstract:
Es ist ein spritzgegossener Preform (1) zur Herstellung von Kunststoffbehältern, insbesondere Kunststoffflaschen, in einem Streckblasverfahren beschrieben, der einen im wesentlichen länglichen Preformkörper (2) aufweist, dessen eines Längsende geschlossen ausgebildet ist. An seinem gegenüberliegenden Längsende schliesst an den Preformkörper (2) ein mit einer Ausgiessöffnung (4) versehener Halsabschnitt (3) an, dessen Aussenwandung (5) Befestigungsmittel (6) zur formschlüssigen Festlegung eines mit korrespondierenden Eingriffsmitteln ausgestatteten Verschlussteils aufweist. Der Halsabschnitt (3) besitzt wenigstens eine wenigstens bereichsweise umlaufende Engstelle (7) mit einer Wandstärke (t) von 0,4 mm bis 0,8 mm. Das spritzgegossene Kunststoffmaterial liegt zumindest an der wenigstens einen Engstelle (7) in einem hochorientierten, durch einen Spritzgußprozess erzeugten wenigstens teilweise kristallinen Zustand vor.
Abstract:
Plastic aerosol container (12) having a thermally crystallized neck finish (18) configured to receive an aerosol valve assembly (1) and an expanded strain oriented aerosol container body (12) integral with the neck finish. A junction between the thermally crystallized neck finish and the strain oriented container body defines a pull point at which strain orientation begins.
Abstract:
A process for the manufacturing and filling of plastic containers, said process comprising the steps of: a. positioning a preform (1) with relation to a mold assembly of two or more components (20, 21, 22), said preform generally being fabricated from a plastic and being provided with a longitudinal axis (17) and presenting a stretchable portion (13) and a non-stretchable portion (11); b. stretching said preform along its longitudinal axis (17); c. injecting a fluid (29) into the interior volume (6) of the preform (1), said fluid (29) being under such pressure as to cause the preform (1) to plastically deform until achieving the desired size and shape; and d. releasing said container from the mold assembly (20, 21, 22) and sealing the container, and in which at least a portion of the stretchable portion (13) of the perform (1) is at a temperature below its vitreous transition temperature (Tg) and, preferably, at ambient temperatures.
Abstract:
A blow-molding method for forming a squeezable or tubular plastic container is provided. The method includes molding a preform having a sidewall, an interior cavity, an open end, a closed end, and a neck adjacent the closed end of the preform. The neck of the preform has an engagement structure. The method includes providing a blow mold system including a blow mold cavity. The method includes placing at least a portion of the preform into the blow mold cavity, and blow molding a one-piece container body from the preform by inflating the preform within the blow mold cavity. The container body has an open end, a closed end and a neck adjacent to the closed end. Wherein the open end of the container body is formed from the open end of the preform, and the closed end of the container body is formed from the closed end of the preform. The method includes creating a dispensing opening through the closed end of the container body.
Abstract:
Disclosed herein are, amongst other things, a molding apparatus with which to mold, in use, a preform of a type for blow molding into a container. The molding apparatus includes a lock ring (104, 204) for use in a first stack portion (108) of a mold stack (120). The lock ring (104, 204) includes a tubular body (150, 250) that is configured to define, amongst other things, a support interface (194) in cooperation, in use, with a split insert (6, 106) of the first stack portion through which a compressive load is transferrable during molding of the preform, wherein the support interface (194) includes a support shelf (154) that is defined, at least in part, on a first major promontory (152, 252) of the tubular body (150, 250).
Abstract:
The present invention relates to a blow molding apparatus and blow molding method for molding a container, the internal space of which is divided by a partition, and to a container produced by the apparatus and method. More particularly, the present invention relates to a blow molding apparatus, to a blow molding method, and to a container produced by the apparatus and method, wherein the apparatus has a heating zone provided with air cooling means arranged together with heating means so as to uniformly heat a preform, and a blowing zone provided with a resistant member which moves backward in accordance with the extension of the preform, thereby preventing the deterioration of the quality of the molded container or preventing an increase in a defective ratio despite an improvement in production speed.
Abstract:
The invention relates to the production of hollow plastic containers (2) comprising a narrow opening (2a) and a body (2b) having a base (10) and at least one side wall extending longitudinally between the narrow opening and the base, such as bottles or similar, from a multi polyester preforms by means of stretch blow molding. A blend of polyethylene terephtalate (PET) and polytrimethylene terephtalate (PTT), with a weight proportion of PTT in the range 5-50% is injected to obtain the preform (1). The body (5) of the preform is subjected to an overall stretching ratio comprised between 16 and 50, whereby the weight of the container produced by stretch -blow molding may be reduced. A preform for implementation of the process, a hollow plastic container and a use of the hollow plastic container are also described.
Abstract:
A preform (200, 300, 400, 500, 800a, 800b, 900, 1000) suitable for blow-molding into a final- shaped article is provided. The preform (200, 300, 400, 5000, 800a, 800b) comprises a neck portion (202, 302, 402, 502); a gate portion (206, 306, 406, 506); and a body portion (204, 304, 404, 504) extending between the gate portion (206, 306, 406, 506) and the neck portion (202, 302, 402, 502); the body portion (204, 304, 404, 504) defining: a first portion (210, 310, 410, 510, 810), a second portion (212, 312, 412, 512, 812) and a third portion (214, 314, 414, 514, 814), the second portion being disposed in-between the first portion and the third portion located in sequence along one of: (i) substantially the whole circumference of the body portion and (ii) substantially the whole length of the body portion; one of the first portion, second portion and the third portion having a stretch ratio different that at least one of the other ones of the first portion, the second portion and the third portion.