Abstract:
A device for heating thermoplastic preforms, including a heating channel formed from a heating module and through which the regions of the preforms to be heated are guided by a conveyor device. Radiant heaters are arranged on a side wall of the heating channel. In the region of a side that lies opposite the radiant heaters and/or the base of the heating channel, reflector elements which act as counter or base reflectors are arranged. The reflector has a reflection layer and a carrier layer. The reflection layer includes a material with a silicon dioxide base and an IR reflection value greater than 90% in the range of 500 to 2500 nm. The carrier layer is a material with greater mechanical strength than the reflection layer and is used as a carrier for the reflection layer. Both layers have a similar coefficient of thermal expansion and are permanently interconnected.
Abstract:
A method for holding together, in its closed state, a blow mold of multipiece design of a blowing station for the blow molding of containers from preforms made of a thermoplastic material using a compressed air-operated mold clamp exerting a holding-together force. The mold clamp is pressurized with compressed air for the purpose of and for the duration of the generation of the holding-together force. The blowing station has a relief valve which can be controlled by control compressed air from a control compressed air line. The mold clamp is pressurized at least at times with control compressed air from the control compressed air line.
Abstract:
The invention relates to a gripper for holding workpieces, in particular preforms or containers, in their neck region, having a gripper base on which two gripper arms are pivotably arranged, which each have gripping ends for partially enclosing the neck region, wherein the gripper arms are held in a base position under spring tension, in which the gripping ends can jointly enclose and hold a neck region and, if they come into contact with an obstacle, can be pivoted out of the base position jointly in one direction, wherein one of the gripper arms as the main arm (13, 13′) is clamped via a spring (20) with the gripper base (11), which pulls the main arm (13, 13′) into contact with the other gripper arm, functioning as a secondary arm (14, 14′), in the base position, and the main and secondary arm (13, 13′; 14, 14′) are each mounted in a joint (18, 19), wherein the joint (19) of the secondary arm (14) is closer to its gripping end (16) than the joint (18) of the main arm (13), and the main and secondary arm press against one another in the closed position at least in two regions (21, 22), one of which is located above the joint (19) of the secondary arm (14) and the other below it on a lever (25) of the secondary arm (14) extending downward from the joint (19).
Abstract:
The invention relates to a method for producing a container from a thermoplastic parison, the container being produced from the parison with the aid of a fluid, either by blow molding and subsequent filling with a fluid that is in particular liquid, or being produced by hydroforming and subsequently containing the liquid fluid as contents, and, during the blow-molding process and/or when receiving the in particular liquid fluid, the container revolves about and is spaced apart from an axis of rotation extending, in particular, vertically, in a mold that can be opened. According to the invention, the closed mold adopts, at least temporarily, an inclined position, i.e. that deviates from a perpendicular position.
Abstract:
The invention relates to a transport system for transporting preforms in a device for the blow-molding production of finished containers, wherein the transport system comprises a transport chain, the chain elements of which have a support element for transporting the preforms, wherein the support element comprises a shaft part and a head part, and the head part has a head end region that can be introduced into the opening section of the preform, characterized in that the head part is retained on the shaft part and can be detached from the shaft part via actuation of a first actuation element, wherein the first actuation element is arranged in the shaft part end region facing away from the head part. The invention also relates to a device for the blow-molding production of finished containers from preforms, a use, as well as a method for exchanging at least one head part, each making use of the transport system according to the invention.
Abstract:
A method and device for producing containers filled with liquid content from preforms made of thermoplastic material. The liquid content is fed as a pressure medium into thermally conditioned preforms during a forming and filling phase in a mold of one of a plurality of forming stations arranged circumferentially spaced apart on a common, continuously rotationally driven working wheel. A compensating device compensates for thermal consequences of centrifugal force acting on the liquid content fed into the preform during the forming and filling phase. The compensating device imparts a temperature profile to the preform in a circumferential direction, which is not point-symmetrical in relation to a longitudinal axis of the preform to produce a thermally differentiated partial circumferential region. The preform is inserted into the mold such that the thermally differentiated partial circumferential region faces in a radial direction of the working wheel.
Abstract:
The invention relates to a method and an apparatus for producing liquid-contents-filled containers (22) from preforms (1) by contents being introduced into the preform (1) under a filling pressure, wherein the contents are placed under pressure by a pressure pump (7) and are introduced into the preform (1) at a molding and filling station (3) by a filling valve (6). A pressure accumulator (10) arranged between the pressure pump (7) and the filling valve (6) is subjected to pressure and is filled with a volume of contents by the pressure pump (7). The invention is distinguished in that a displacement pump (26) having a filling chamber (28) for the contents and having a displacement body (30) guided so it is movable therein is provided, wherein the displacement body (30) divides the chamber (28) into a first partial chamber (28a) on the filling station side and a second partial chamber (28b) facing away from the filling station, each of which can be brought into a fluidic connection with the pressure accumulator (10). The displacement body (30) has a drive connection to a drive unit (32) and is drivable by the drive unit (32), wherein when the filling valve (6) is opened, the drive unit (32) and/or the pressure accumulator (10) each at least temporarily apply a drive force to the displacement body (30), and at the same time the displacement body (30) displaces at least a part of the quantity of contents required for the forming of the preform (1) in the direction of the preform (1).
Abstract:
A device including a drive mechanism and a mold carrier that is divided into a first part (3a) and a second part (3b) which are configured to hold a respective section (2a, 2b) of a mold for forming a hollow container from a parison through the introduction of a gaseous or liquid pressurized medium under pressure into the parison. The first part (3a) is connected to the drive mechanism (6) by a first part connection region (7a) and is rotatable by the drive mechanism about an axis of rotation (A) such that the first part and the second part are transitionable between an open position and a closed position relative to each other. The first part connection region passes through a protective wall (8) that is arranged between and separates the mold carrier from the drive mechanism and thereby protects the drive mechanism against contamination on the mold carrier side.
Abstract:
A device and method for producing a filled container from a preform using liquid contents introduced under pressure into the preform that includes a molding and filling station having a mold in which the preform is converted into the filled container and a molding and filling head to which the liquid contents are supplied under pressure via a supply line. The molding and filling head has a filling valve for controlling a supply of the liquid contents to the preform that includes a first and a second pipe stub of substantially identical diameter arranged at a distance from one another, a valve body arranged between the stubs having a largest diameter that corresponds to the diameter of the pipe stubs, and a sleeve that is displaceable along and bridges the distance between the pipe stubs in a leak-tight manner. The sleeve has a maximum internal diameter that is greater than the largest diameter of the valve body, and is displaceable along the pipe stubs such that, in a closed position of the valve arrangement, the sleeve is in contact with a sealing surface arranged on the valve body that has a diameter that is substantially the same as the diameter of the pipe stubs.
Abstract:
The device is used for the blow-molding of containers. A preform made of thermoplastic material, following a thermal conditioning within a blow-mold, is stretched by a stretching rod and is reshaped by effects of blowing pressure into the form of a container. A specification for the positioning of the stretching rod occurs through the use of a linear drive. Blowing pressure is created through the use of at least one positionable blowing gas supply. The linear drive is at least intermittently mechanically coupled with the positionable blowing gas supply and the stretching rod in such a way that coordinated movement kinetics are carried out. The coupling means and the coupled elements are constructed in such a manner that the axis of motion and the resulting force-effect axis form a common spatial axis.