摘要:
An apparatus and method for simultaneously forming and filling a plastic container is provided. A mold cavity defines an internal surface and is adapted to accept a preform. A pressure source is a servo motor system that includes an inlet. The servo motor system is operable to draw liquid through the inlet and urge it into the preform. A blow nozzle may be adapted to receive the liquid from the pressure source and transfer the liquid at high pressure into the preform thereby urging the preform to expand toward the internal surface of the mold cavity and create a resultant container. The liquid remains within the container as an end product.
摘要:
The method and the device are used to sterilize preforms (1) which are made of a thermoplastic material and which are provided for producing blow-molded containers. In the sterilizing procedure, a sterilizing agent is introduced into the area of the preform (1). The preform (1) is heated for at least part of the duration of the sterilizing procedure.
摘要:
The invention relates to a method for producing a vessel (2) by blowing in a mould (11) from a preform (3) made of a plastic material, comprising the following steps : memorising the variations of the pressure (P) inside the preform (3) at least during the interval between the pre-blowing cue (tP) and the blowing cue (ts); detecting in said interval a so-called expansion end moment (tc) from which the pressure in the preform (3) increases in a linear manner; advancing the blowing cue (ts) according to the expansion end moment (tc).
摘要:
The present invention relates to a process for blow molding a polyethylene container comprising the steps of: a) providing a solid preform made from a polyethylene material having a melt flow index from 0.01 to 10.0 g/10 minutes, wherein the preform comprises a neck region, side walls and a base region, and wherein the side walls between the neck region and the base region have substantially straight and parallel outer walls; b) reheating the preform so that the maximum temperature difference between the hottest and coldest regions of the side walls and the base region of the reheated preform is less than 4°C; c) transferring the reheated preform to a blow mould; d) stretching the preform at a pressure below 10 bars; and e) increasing the pressure within the reheated preform so as to cause the walls of the stretched preform to expand to the shape and dimensions inside the blow mould. A polyethylene container made according to the present invention preferably has a minimum wall thickness of the container of less than 200 micrometers, and a weight to volume ratio of the empty container of less than 50 grams per litre.
摘要:
The equipment consists of a mould (1) with external heating elements (3) and with asymmetric heads (4) at the ends thereof, allowing insertion of the corresponding tubular profile or plastic tube (6) inside the already hot mould (1) at the same temperature as the actual mould (1) in order to prevent any heat exchange. The mould (1) is mounted on a support (2) that can tilt and rotate, whilst the heads (4) include a vacuum take-off orifice (5), fastening means (7) for the plastic tube (6), which, once inserted into the mould (1) rests on the lower generatrix of the latter, and inlet (8) and outlet (9) means for fluids for expanding the plastic tube (6) and for cooling same, the mould (1) incorporating, on the side, an inlet orifice for a lubricating fluid that facilitates removal of the plastic tube (1) once the latter has been shaped. The tube (6) expands owing to the introduction of the expander fluid through the inlet (8).
摘要:
L'invention concerne un procédé de fabrication par soufflage de corps creux en matière plastique dans un moule à partir d'une préforme (7) comportant les étapes suivantes : - lors d'une première étape de présoufflage (106), on insuffle du gaz dans la préforme à une première pression, - lors d'une seconde étape de soufflage (108), on insuffle du gaz dans la préforme à une seconde pression supérieure à la première pression pour obtenir le corps creux, et - lors d'une troisième étape de dégazage (110) du corps creux, on récupère le gaz qui a été soufflé dans l'ébauche à la seconde pression lors de la seconde étape de soufflage,
caractérisé en ce que l'on comprime le gaz récupéré en vue de son utilisation lors d'une étape de soufflage ultérieure. L'invention concerne également un dispositif et une installation pour la mise en oeuvre du procédé.