Abstract: Disclosed is molding unit for the forming of containers made of thermoplastic material including: two half-molds delimited by a front joint face and by a rear assembly face, with the two half-molds being able to occupy a joined position via their joint face; and a molding cavity that is made of two parts in each joint face, where the cavity opens vertically upward via a passage opening. In the joined position, the assembly faces of the mold have two planes of symmetry that intersect at a central vertical axis of the mold. The central axis of the passage opening is offset transversely in relation to the central axis of the mold.

Abstract: A blowing tool for a blow molding machine for producing hollow members with an angled neck includes a handling device for the blowing mandrels which enables a biaxial movement of the blowing mandrels within a plane. The blowing tool has a blowing mandrel retention member, wherein at least one blowing mandrel is arranged on the blowing mandrel retention member and each blowing mandrel is arranged in an inclined manner with respect to horizontal at a corresponding angle of inclination. The handling device includes a biaxial system configured to move each blowing mandrel retention member in a first, preferably vertical direction and a second, preferably horizontal direction within a plane.

Abstract: The present invention surrounds an apparatus and method for the use in injection molding of articles of manufacture using an injection molding apparatus having a valve-gate pin or a plurality of valve-gate pins for actuation to extend and retract from a cavity within an injection mold. The valve-gate pin may have a retention feature or retention features configured for the retention of molded parts such that the retraction or extension of the valve-gate pin provides part removal from an associated injection mold. Further, the valve-gate pin may have a feature or features to facilitate the injection of fluids, gases or particles during or after the primary injection process. Additionally, a plurality of such valve-gate pins may be employed within each mold cavity, or within each valve-gate actuation system.

Abstract: The present disclosure is directed to a mold assembly for vacuum forming a component. The mold assembly includes plurality of support plates and a plurality of mold plates removably coupled to the plurality of support plates. The plurality of mold plates is stacked and removably coupled together to form a mold configured for forming the component. Each mold plate including a first surface partially defining a top surface of the mold, a second surface spaced apart from the first surface, a third surface extending from the first surface to the second surface, and a fourth surface spaced apart from the third surface and extending from the first surface to the second surface.

Abstract: A blow molding capable of maintaining the parison thickness distribution uniform, fabricating high-quality molded products, and improving its productivity. A parison supply device for supplying, to a blow mold, a parison discharged from an extrusion die, the parison supply device including: a pair of chucks for pinching, from above and below, a parison discharged downward from the extrusion die; and a chuck operation part for controlling an operation of pinching the parison by the pair of chucks and an operation of moving the pair of chucks. By the chuck operation part, the pair of chucks performs the operation of pinching the parison while being moved downward.

Abstract: A sewer hose including a corrugated central body integrally joined at opposing longitudinal ends by attachment collars, a first collar defining one or more locking channels, and a second collar defining one or more lugs sized and shaped for insertion into respective channels. A method of manufacturing the hose is also disclosed, including the steps of providing mold segments sized and shaped to produce the aforementioned collar sections as well as the corrugated central body, deploying them in a molding apparatus, and injecting a polymeric material into the mold segments so as to form a sewer hose with integrally attached male and female attachment collars, negating inefficient and ineffective attachment adapters.

Abstract: A device for producing container products of plastic materials, particularly by carrying out a molding, filling and sealing method, includes a molding device (13) that can be supplied with a molding tube (15) of plasticized plastic materials and that has a movable molding surface (17), adapted to the predefinable geometry of the container. The molding tube (15) can be laid on the molding surface for a shaping, filling and/or sealing process. A guide and retainer device (25) includes movable guide and retainer parts (77, 81; 79, 83) able to be controlled to engage, outside the molding region of the molding device (13), on the molding tube (15) itself and/or on the plastic material that surrounds each manufactured container product and/or its container.

Abstract: The invention relates to a method for producing hollow bodies from thermoplastic material and to an apparatus for carrying out the method. The method comprises the molding of at least two sheet-like preforms in web form of thermoplastic material into two complementary shells in a multi-part tool, which in a closed position forms a mold impression, and the joining together of the shells to form an essentially closed hollow body, the preforms being brought between the parts of the tool in an opened receiving position of the parts of the tool and the preforms being placed into the part-cavities by applying differential pressure and being at least partially molded in them into shells. The shells are joined together to form an essentially closed hollow body by closing the tool to form a closed mold impression. The method is distinguished by the fact that the preforms are molded in the part-cavities while the parts of the tool are located in the opened receiving position.

Abstract: An apparatus for forming a blow-molded container includes a mold, a mandrel, and a die. The mold includes a bottom section for forming a container bottom, a sidewall section for forming a plurality of sidewalls, a spout section for forming a spout, and a neck section for forming an upwardly converging neck member coupling the sidewalls to the spout having a convex radius transition section of approximately three inches in a container having an overall height of approximately ten inches. The mandrel and the die are operative to form a parison that assumes an ovoid cross-section within the mold with the outer surfaces of the parison positioned approximately equidistant from sidewall section of said mold.

Abstract: A blow molding device and method capable of forming a blow molded article having a built-in part with a good yield rate. The blow molding device has a die core, a blow mold, a parison holding unit and a built-in part holding unit. The parison holding unit has parison expanders and a parison outer holding plate. The built-in part holding unit has an airtight guide tube and a holding rod. After a lower end of a parison is expanded with a plurality of parison expanders, and an upper end of the airtight guide tube is inserted in the lower end of the parison, the lower end of the parison is held between the upper end of the airtight guide tube and the parison outer holding plate, and the pre-blowing is carried out. After the built-in part is positioned in an interior space of the parison, and the parison and built-in part are held between the slide cores, the blow mold is closed and blowing is carried out.

Abstract: In a crosshead, a pair of sheets (7) are formed by bisecting a parison (3) suspended from a resin flow passage (30) formed between a core (9) and a die (8) by causing a first dividing body (33) of a separator (5, 5a) provided on the core (9) or the die (8) to contact a second dividing body (40) provided on the core (9) or the die (8).

Abstract: Machine for forming containers (3a), comprising a unit (2) for extruding tubes (3) made of plastic, associated with an electric extrusion motor (200), a blowing unit (5) associated with an electric blowing motor (500), a mould (4) for containing the containers (3a), formed by two half-moulds (4a,4b) movable, upon operation of an associated electric mould motor (400), in a longitudinal direction X-X, the unit formed by the mould (4) and by the associated mould operating motor (400) being displaceable, upon operation of an electric displacement motor (300), in a transverse direction (Y-Y) from a first position substantially aligned with the extrusion unit (2) into a second position substantially aligned with the blowing unit (5) and vice versa, comprising at least one base power supply/recovery module (2000) and at least one first control module (2300) connected to said displacement motor (400) for controlling the acceleration/deceleration thereof.

Abstract: A linear machine for blow moulding hollow bodies includes: an extruder feeding a head for extruding juxtaposed parisons lying on an imaginary vertical plane parallel to or coincident with the imaginary plane containing the longitudinal axis of the extruder itself; mould and counter-mould assemblies with respective grippers which can be alternately moved along an axis contained in the imaginary vertical plane of the extrusion head itself; and a unit for transferring the containers cyclically formed by the moulds onto a single conveyor located laterally to the path of the mould and counter-mould assemblies. The conveyor resides longitudinally under the extruder. The mould and counter-mould assemblies can move horizontally. Components cyclically and linearly raise and lower the extruder and/or the head, preventing the parison products from interfering both with each other and with the moulds as they come out in a closed condition due to the cooperation with the extrusion head.

Abstract: An extrusion blow molding machine comprises an extrusion apparatus, an electrically-driven parison thickness programming apparatus, an electrically-driven mold-clamping apparatus with a dual-driving function, and a frame, wherein the extrusion apparatus, the parison thickness programming apparatus and the mold-clamping apparatus with a dual-driving function are installed on the frame. The mold-clamping apparatus with a dual-driving function comprises a driving assembly, a mold-opening/closing assembly, a mold-moving assembly, and a base. The driving assembly includes a servo motor, which actuates both mold-opening/closing and mold-moving assemblies, respectively. The parison thickness programming apparatus is driven by asynchronous motors, which run in a single direction continuously to result in a required axial parison thickness distribution. An extrusion blow molding method is realized using the machine.

Abstract: A blow head for production of a multilayer blown film with at least two plastic layers has melt guide areas, which are traversed in succession in the direction of flow (z) of the melt, including feed lines to at least two individual gaps for guiding an individual stream, and an annular gap for combining of the film composite. At least one thermocouple is arranged on at least one flow path of at least one individual stream before the stream reaches the annular gap.

Abstract: An extrusion blowmolding apparatus has an extrusion die having an upstream portion for receiving the thermoplastic polyester material and a downstream portion having a die head through which molten thermoplastic polyester material is flowed to form a parison suitable for extrusion blowmolding. The extrusion die has extending therethrough a generally cylindrical barrel and an extrusion screw disposed within the barrel having spiral flights along its length. In some aspects, the flight depths are lengthened so to provide a good melt at a suitable throughput. By also selecting an appropriate extrusion temperature profile, it is possible to eliminate or minimize unmelts, which can contribute to processing difficulties as well as defects in the resulting article. In other aspects, a closed-loop drying system is provided for achieving very low moisture levels in the polyester material to improve processing.

Abstract: A continuous blow molding machine includes a mechanism for shifting molds upstream after closing to reduce between-mold flash.

Abstract: The present invention relates to a blow-molding machine for thermoplastic pieces and containers, which is designed to work simultaneously with two or more molding lines, wherein said machine comprises an extrusion set (2), and a blow-molding set (3); said blow-molding set (3) is coupled to the extrusion set (2); said blow-molding set (3) is formed by an extrusion head (4), at least one blowing station (5), and at least one molding station (6). In addition to increase the productivity, the blow-molding machine disclosed herein also allows a slight increase in the diversity of finished products, provided that they are made from the same material (type of thermoplastic material) with similar dimensions. The main advantages of using the blow-molding machine are directly related to the fact that the production is increased in an exponential way, without the need to use other blowing stations, and using almost the same physical space of a conventional similar machine.

Abstract: An extrusion blow-molding device (1) for producing plastic containers, particularly plastic bottles, is proposed, comprising an extruder head (3), which is connected to at least one extruder (2) for plastic material and has at least one extrusion die (4), a blow-molding tool arrangement (5) having at least one blow-molding cavity (6) and at least one injection device (7), which is disposed on the side of the blow-molding tool arrangement (5) facing away from the extruder head (3) and can be inserted into the blow-molding cavity (6) through an opening provided there. During a production cycle, the extruder head (3) can be axially adjusted in terms of the height thereof relative to the blow-molding tool arrangement (5). To do so, the extruder (2) is articulated along the longitudinal extension thereof on a rotational axis (9) and can be tilted in the manner of a rocker, and the extruder (2) is configured such that the height thereof about the rotational axis (9) thereof can be adjusted.

Abstract: Process for manufacturing a plastic hollow body, the process comprising the following steps: a) a tubular stream of molten plastic is extruded; b) this stream is taken up by means of a tensioning device; c) a transverse cut is made in this stream so as to create a parison having one free edge that is not taken up by the tensioning device; d) the parison is moved relative to the tensioning device so that the free edge of the parison is also taken up by the tensioning device; and e) at least one longitudinal cut is made in the parison over its entire length. Equipment suitable for implementing this process.

Abstract: A device and method are disclosed for the production of hollow bodies, especially plastic bottles, wherein a section of a plastic flexible hose is placed in a cavity of a blow mold by an extruder head according to a predefined clocked pulse. The plastic flexible hose is inflated inside the blow mold by a blow mandrel by overpressure according to the blow mold cavity. The manufactured inflated hollow body is subsequently removed from the mold. The plastic hose can be continually held on opposite sides of the blow mold arrangement during the entire extrusion and blow cycle.

Abstract: The present patent application provides a flower pot mold for blow molding. The mold can reduce the number of the sliding blocks that need to be moved, and utilize the motion of a single sliding block to mold a flower pot so as to improve the manufacturing efficiency and the product quality. The mold includes a flower pot cavity template; a container opening pulling mold; a plurality of opening flanged pulling plates, a blowing tube being disposed in the container opening pulling mold; a fixing plate configured for fixing the mold onto a clamping set; a guiding block configured for guiding the opening flanged pulling plate and a blocking plate; and the blocking plate configured for blocking the plastics. A sliding track is formed on the flower pot cavity template and configured for allowing the blocking plate to move back and forth.

Abstract: A process for producing thermoplastic containers (13) extrudes a plastic tube into opened movable mold parts (5, 7, 9). The main mold parts (7) form the container main part (18). The bottom parts are closed to close and weld the tube bottom end. The tube (3) is widened by a pressure gradient acting on it, forcing the tube against the wall of the mold parts (7, 9) to form the container. The mold parts are then moved into the position to open the mold for removal of the formed container (13). The container bottom is made in the form of a cup-like bottom part (19) axially extending into the container main part (18) by the bottom part being everted into the interior of the container (13) to form a bottom elevation (31).

Abstract: A system for purging molten thermoplastic material from a molding apparatus. The purge system includes a blow mold apparatus, a purge diverter valve operably connected to the blow mold apparatus and including a channel, a closing member, a spacer having a conduit in communication with the channel, and a melt pipe. The system can be used to purge molten thermoplastic materials out from an upward extruding blow mold apparatus.

Abstract: A mold unit has first and second parts, each with a plurality of cooperating cavity portions. The mold unit further has similarly interconnected third and fourth mold parts. An operating system moves the mold parts to change the mold unit between first and second states. The first and third mold parts meet at a fixed, first parting line to define a first plurality of mold cavities, and the second and third mold parts meet at a fixed, second parting line to define a second plurality of cavities with the mold unit in the first state. In the second state, molded products formed from the parisons can be released from their cavities.

Abstract: A continuous blow molding machine includes a mechanism for shifting molds upstream after closing to reduce between-mold flash.

Abstract: A device for producing a tubular object from thermoplastic material includes a die, a plunger, and a withdrawal unit. The movements of the withdrawal unit, plunger and die body are controlled such that the movement of the withdrawal unit is carried out according to a freely adjustable velocity profile over the path of the withdrawal unit. Movement of the plunger is carried out according to a freely adjustable velocity profile over the plunger path and movement of the die body is carried out according to a freely adjustable position profile over the path of the withdrawal unit or plunger. In this manner, the wall thickness of the tubular object may be adjusted with high accuracy over its length.

Abstract: An extrusion blowmolding apparatus has an extrusion die having an upstream portion for receiving the thermoplastic polyester material and a downstream portion having a die head through which molten thermoplastic polyester material is flowed to form a parison suitable for extrusion blowmolding. The extrusion die has extending therethrough a generally cylindrical barrel and an extrusion screw disposed within the barrel having spiral flights along its length. In some aspects, the flight depths are lengthened so to provide a good melt at a suitable throughput. By also selecting an appropriate extrusion temperature profile, it is possible to eliminate or minimize unmelts, which can contribute to processing difficulties as well as defects in the resulting article. In other aspects, a closed-loop drying system is provided for achieving very low moisture levels in the polyester material to improve processing.

Abstract: A blow molding device capable of securely closing a lower end of a parison to prevent the parison from being crushed. The blow molding device includes a blow mold and a parison holding unit. The parison holding unit includes an inner holding plate adapted to be inserted in an interior of the lower end of the parison, and an outer holding plate adapted to hold an outer surface of the lower end of the parison, and the outer holding plate has a recess conforming to a configuration of the inner holding plate and is split into a plurality of holding plate members such that each of the split holding plate members is capable of sliding to hold the lower end of the parison.

Abstract: An automotive fuel tank fabrication apparatus is provided. The automotive fuel tank has a blow mold and a built-in part holding unit. The built-in part holding unit includes a plurality of holding rods for holding a built-in part. The holding rods are made to freely advance and retreat in such a manner as to hold the built-in part in a position where the built-in part confronts cavities when the blow mold is opened and to retreat from the blow mold when the blow mold is closed with the built-in part left positioned in an interior of a parison. The holding rods are formed in such a manner that their diameters are reduced as they extend towards distal ends thereof and are inserted into insertion holes formed in the built-in part so as to hold the built-in part.

Abstract: A dosing bottle is made by injection molding a synthetic resin preform with a threaded neck finish portion and a body portion. The neck finish has an internal collar adjacent said lower end thereof. The preform is removed from the injection mold and inserted into the mold of a blow molding machine. The mold has a cavity with a body portion conforming to the desired configuration and dimensions for the body of the bottle and a neck portion closely conforming to the configuration and dimensioning of the neck portion of the preform. The preform is heated and inserted into the blow mold cavity with the neck finish portion of the preform being sealed from the body portion of the cavity. Air is introduced into the body portion of the preform to blow the body portion of the preform into conformity with the body cavity while precluding any distortion of the collar and of the neck finish.

Abstract: A blow molding device capable of securely holding a built-in part in a prescribed position in an interior of a blow molded article with a compact equipment. The blow molding device includes a blow mold and a built-in part holding unit. The built-in part holding unit includes a holding rod adapted to hold the built-in part and arranged to freely advance and retreat to be removed from the blow mold. The blow mold includes a slide core in each of two mold members so as to freely advance and retreat relative to a cavity of the blow mold, and a drive control pin in each of mating faces of split two mold members, and the drive control pin and the slide core are linked with a linking member. The slide core is driven with the drive control pin such that when the blow mold is closed, the slide core retreats from an interior of the cavity to a molding surface defining the same at the same speed as the closing speed of the blow mold.

Abstract: Process for manufacturing a plastic hollow body, the process comprising the following steps: a) a tubular stream of molten plastic is extruded; b) this stream is taken up by means of a tensioning device; c) a transverse cut is made in this stream so as to create a parison having one free edge that is not taken up by the tensioning device; d) the parison is moved relative to the tensioning device so that the free edge of the parison is also taken up by the tensioning device; and e) at least one longitudinal cut is made in the parison over its entire length. Equipment suitable for implementing this process.

Abstract: An apparatus for producing a parison having a plurality of resin layers and at least one resin layer of varying thickness is disclosed. The parison is used to form containers in a blow mold machine. An extruder is in communication with a flow head to form the parison. The apparatus includes a valve block having a duct providing communication between a second extruder and the flow head. Flow of resin from the second extruder directly to the flow head is controlled by a valve in the valve block. An accumulator cylinder and piston are also in communication with the duct and control the resin pressure within the duct. Opening and closing the valve and stroking the piston sends resin from the second extruder to the flow head and forms a resin layer having a varying thickness on the parison. A method of forming a varying layer is also disclosed.

Abstract: A manufacturing apparatus of a resin container includes a main extruder which supplies a base material resin, and a sub-extruder which supplies a sub-material. The sub-material supplied from the sub-extruder is discharged from a discharge portion provided in a die head so that the sub-material joins the base material resin continuously supplied from the main extruder. A parison is then extruded from a slit portion opened on an end side of the die head, and subjected to blow molding, thereby forming a coating layer which covers the whole or a part of a container body formed of the base material resin by using the sub-material. A suck-back mechanism which pulls back the sub-material from the discharge portion is provided between the sub-extruder and the die head, and the discharge portion is provided in the vicinity of the slit portion in-the die head.

Abstract: The invention relates to a device for the production of multi-layer, co-extruded, tubular pre-forms made from thermoplastic plastic. A co-extrusion head (10) comprises co-axially arranged flow channels (FK1, FK2), each supplied by a single inlet opening (ZF1, ZF2) with a material melt, distributed annularly in a distribution ring (26, 28). The gap width in each distribution ring (26, 28) is greater in the vicinity of the inlet opening (ZF1, ZF2) than the gap width (s2, s6) in the region of the side opposing the inlet opening (ZF1, ZF2). The flow channels (FK1, FK2) are also asymmetric with regard to the gap widths.

Abstract: A machine for molding containers, comprising a unit for extruding plastic tubes, a blow-molding unit, a mold for containing containers which is formed by two half-molds movable, upon operation of associated first actuator, in a longitudinal direction (X-X) and symmetrically with respect to a fixed axis (Z-Z) perpendicular to said longitudinal direction, the unit formed by the mold and by the associated first actuator being movable, upon operation of second actuator, in a transverse direction (Y-Y) from a first position where it is substantially aligned with the extrusion unit into a second position where it is substantially aligned with the blow-molding unit and vice versa, said first actuator for operating the half-molds in the longitudinal direction comprising at least one motor, the shaft of which has, keyed thereon, a cam for actuating a pair of connecting rods which are arranged in-line and are respectively connected to the first half-mold and to the second half-mold.

Abstract: An extruder device includes an extruder worm and a worm drive that has a drive motor, which is provided with a rotor. The rotor is connected to the extruder worm during operation in such a way that the rotor and extruder worm rotate at the same speed during operation. The rotor can be connected to detachable torque-transmitting elements which transmit torque between the rotor and the extruder worm and which can be detached when refitting occurs. The detachable torque-transmitting elements include a torque-transmission point at which torque is transmitted from a bushing to a connecting section which is at least partially encompassed by the bushing. The torque-transmission point in an axial direction is located outside the rotor.

Abstract: A single-sided shuttle-type blow molding apparatus having an extruder for substantially continuously extruding a thermoplastic material in tubular form at a moldable temperature downwardly along a vertical axis. The apparatus includes a mold having a set of mold parts adapted to open and close relative to each other to define, when closed, a mold cavity. A shuttle having the mold mounted thereon is arranged to move along a closed path from a first position wherein the mold engages, when open, a finite length of the thermoplastic tube, to a second position away from the first position. The apparatus further includes a blow head adapted to blow the finite length of the thermoplastic tube to form the container as the mold moves from the first position to the second position of the closed path. The apparatus includes no more than one mold. A method is also described.

Abstract: An extrusion blow-molding device (1) for producing plastic containers, particularly plastic bottles, is proposed, comprising an extruder head (3), which is connected to at least one extruder (2) for plastic material and has at least one extrusion die (4), a blow-molding tool arrangement (5) having at least one blow-molding cavity (6) and at least one injection device (7), which is disposed on the side of the blow-molding tool arrangement (5) facing away from the extruder head (3) and can be inserted into the blow-molding cavity (6) through an opening provided there. During a production cycle, the extruder head (3) can be axially adjusted in terms of the height thereof relative to the blow-molding tool arrangement (5). To do so, the extruder (2) is articulated along the longitudinal extension thereof on a rotational axis (9) and can be tilted in the manner of a rocker, and the extruder (2) is configured such that the height thereof about the rotational axis (9) thereof can be adjusted.

Abstract: A blow molding apparatus wherein an extruded tubular parison is pressurized to form a molded article, comprises a blow pin for introducing pressurized fluid into the parison, an actuator for advancing and retracting the blow pin and adjusting means for determining the orientation of the actuator to achieve substantial parallelism of a blow pin shaft to which the blow pin is attached and a centerline of the opening through a forming die through which the blow pin shaft passes and to achieve substantial parallelism of a sealing element of the blow pin with a plane transverse to the opening of the parison.

Abstract: The invention discloses a mold, a molding assembly and a molding process for molding two tier array of containers of synthetic polymeric material. The process is particularly related to formed, filled and sealed molded containers.

Abstract: The invention relates to an extrusion blow molding machine (1) with at least one extrusion head (2) and with at least two sheet dies (3), arranged next to one another, for the extrusion of sheet-like plastic preforms (4), with a multipart molding die (5) for processing two preforms into an essentially closed hollow body, having a device for handling the preforms (4). The device for handling the preforms comprises at least two grippers (10), arranged next to one another on a common carrier (8), for receiving the preforms (4), the distance between the grippers (10) being variable.

Abstract: The present invention relates to a blow-molding machine for thermoplastic pieces and containers, which is designed to work simultaneously with two or more molding lines, wherein said machine comprises an extrusion set (2), and a blow-molding set (3); said blow-molding set (3) is coupled to the extrusion set (2); said blow-molding set (3) is formed by an extrusion head (4), at least one blowing station (5), and at least one molding station (6). In addition to increase the productivity, the blow-molding machine disclosed herein also allows a slight increase in the diversity of finished products, provided that they are made from the same material (type of thermoplastic material) with similar dimensions. The main advantages of using the blow-molding machine are directly related to the fact that the production is increased in an exponential way, without the need to use other blowing stations, and using almost the same physical space of a conventional similar machine.

Abstract: A continuous blow molding machine includes a mechanism for shifting molds upstream during closing to reduce between-mold flash.

Abstract: The present invention provides a balloon having a non-uniform thickness that is adapted to facilitate folding of the balloon. The balloon comprises at least one relatively thin section formed between inner and outer surfaces of the balloon, and at least one relatively thick section formed between the inner and outer surfaces. The balloon may be formed from a balloon preform that similarly comprises at least one relatively thin section and at least one relatively thick section. The shape of the balloon preform may be formed, for example, by extrusion. The balloon preform may be placed in a balloon mold having a substantially cylindrical interior surface, and blow-molded to form the finished balloon configuration. The balloon comprises a non-uniform thickness, while comprising a substantially cylindrical outer diameter both after removal from the balloon mold and in an inflated state.

Abstract: An apparatus for forming a parison is described. The apparatus has a mandrel housing. The housing has an axially aligned hollow mandrel channel therein and a side channel substantially transverse to the mandrel channel. A mandrel is also provided. The mandrel has an axially oriented notch in an exterior surface. The notch is in fluid communication with two fluid channels that extend continuously downwardly around the mandrel to meet one another on an opposite side of the mandrel from the notch. When the mandrel is installed within the mandrel channel, a first radial gap and a second radial gap, both between the mandrel and the mandrel housing, are formed.

Abstract: To allow to increase the production capacity of conventional blow molding machines by using the space available within it, more specifically by using the available space in the direction of the nominal path of opening and closing the original distribution line for mold cavities of the blowing machine and through which it will be possible to increase the assembly in distribution lines for mold cavities, which will be located in parallel, in the direction of the nominal path of opening and closing the molds and, for that, the blowing mold as disclosed herewith incorporates an embodiment allowing joint displacement of equal side and intermediary halves composing mold cavities, so to neutralize the force tending to promote the opening of the halves of contiguous mold cavities, which is generated by the pneumatic pressure as introduced, by means of blowing pins, inside parisons which are located at the mold cavities, with no need to change the required compression force to keep closed the mold-bearing tables of th

Abstract: A bottom plate type distributor which may be provided integrally at a internal bottom of FRP pressure vessels. The distributor is composed of a distribution plate and a bowl-shaped inlet dome. The distribution plate comprises an outlet connected to a water outlet pipe, a reinforcing structure around the outlet, a water distribution slot structure supported by the reinforcing structure, a ring structure around the water distribution slot structure, and first connecting structures on the ring structure for connecting the inlet dome. The inlet dome comprises a bowl-shaped body, a receiving structure provided on the concave surface of the bowl-shaped body for connecting said reinforcing structure, second connecting structures around the bowl-shaped body respectively connecting the first connecting structure, an inlet in the center of the bowl-shaped body which is on the same center line as the outlet; and a process hole.

Abstract: A take-out and cooling method and apparatus conveys molded plastic articles from a molding machine to and through a cooling station and preferably includes a take-out apparatus that has a main support, a conveyor carried by the main support for movement in an endless path, a cam adjacent to the support, a plurality of arms carried by the conveyor for movement with the conveyor along the endless path and including a follower responsive to the contour of the cam to vary the position of the arms relative to the support, and at least one holder carried by each arm. Each holder is adapted to receive and carry at least one molded article to facilitate in conveying the molded articles and is flexible and resilient to permit relative movement of at least a portion of the holder relative to its associated arm.