Abstract: An apparatus for installing reinforcing bottom cups on blow molded plastic containers includes a transfer arm which grasps the outer peripheries of a plurality of molded hollow containers, such as bottles, by suction means, transfers the thus held bottles to a first station at which previously adhesively coated bottom cups are pushed upwardly on to the bottoms of the containers, from which station the thus reinforced bottomed containers are sequentially discharged.

Abstract: A blow molding apparatus comprising a wheel plate, a shaft extending horizontally and supporting the wheel plate for rotation and a hub removably mounted on the shaft for rotation with the shaft, and a plurality of sets of molds defining a mold cavity when closed, each set comprising a pair of mold sections, a first mold section of each set being mounted on the hub such that the mold sections are circumferentially spaced about the hub, a second mold section of each set being mounted on the wheel in circumferentially spaced relation and radial alignment with the first mentioned mold section. The second mold sections are mounted on slide assemblies for supporting the second mold sections for movement toward and away from the first mold sections. The hub has circumferentially spaced external surfaces for supporting the first mold sections, the number of surfaces corresponding to the number of first mold sections.

Abstract: Method and apparatus for molding of plastic tubing, including an elongate nozzle receiving an extrudate of an expandible plastic material under pressure from an extrusion head and a coaxial mandrel with air supply and evacuating passages communicating with a vortex generation tube for cooling air before its introduction to the interior of the formed tubing for its blowing and conforming to the walls of a tubular mold cavity formed by a series of forwardly moving molds.

Abstract: A method for producing a container from a tubular blank of polyethylene terephthalate or similar material, according to which a polyethylene terephthalate blank is stretched at least approximately 3-fold to produce a preform (20). In an axial section through the preform, the contour length substantially corresponds to the contour length in an axial section through the final container. The preform (20) is heated to a temperature above the glass transition temperature (TG) and is converted to the container (21) in a blow mold (12). In doing so, the contour length of the material is maintained through successive reduction of the axial length of the body (23) which the preform constitutes during the conversion to the container. In order to achieve this, the base portion of the blow mold (11) is moved towards the orifice (22) of the final container.

Abstract: An article carrier is provided for blow molding equipment which permits relatively simple exchange of the article gripping chuck portion of the carrier. The carrier includes a carrier body, a spindle rotatably supported by the body, an article gripping chuck removeably attached to the spindle and seals between the chuck and the spindle and between the chuck and a preform retained thereby. The chuck is provided with article gripping levers preferably rotatably supported by ball and socket joints. The levers have preform grasping projections at one end and first and second ball ends at the other end. The first ball end mates with the chuck body socket and the second ball end is engaged by a lever actuating ring slidably mounted on the outside of the chuck body.

Abstract: Apparatus for producing a tubular premoulding of a thermoplastic material, suitable for subsequent shaping to form containers by a rolling process. The material in a part of a tube is axially oriented as a result of reducing the wall thickness by applying an external pressure which causes the material to flow. The oriented material is moulded by a blow-moulding process into future mouth parts and parts of adjacent neck sections, preferably from two blank parts, joined to one another, of pre-mouldings, the blank parts in the transition between the two mouth parts being severed in order to form two separate blank parts, so that, after closing one end and, if necessary, reworking in order to obtain the requisite closing faces at the other end, the two blank parts each form a tubular pre-moulding.

Abstract: The invention provides a method of and apparatus for cooling the core rods of an injection blow moulding machine having stripper means and an injection blow moulding machine incorporating the cooling apparatus of the invention. The apparatus of the invention comprises nozzle means, preferably in the form of a hollow nozzle bar the interior of which is connectable to a source of cooling fluid under pressure, separate from the stripper means and comprising a plurality of nozzles which are movable between an out-of-use position and an in-use position in which they are interposed between the core rods and stripper means for directing cooling fluid onto the tips of the core rods and preferably substantially axially of the core rods.

Abstract: A mold, for forming a container by fluid pressure, having two mold halves and two axially movable plungers, the plungers forming the bottom of the container therebetween, an inner plunger or mandrel having a concave end and a second plunger, hereafter called "the bottom part", having a convex end.

Abstract: A machine particularly useful for the blow molding of large thermoplastic articles such as cylindrical drums comprises a plurality of stations through which mold cavities are successively advanced. At a first station, containing a cart-mounted blow assembly an article is blow molded to substantially its final form in a cavity with the blow medium being introduced via a blow pin assembly operatively associated with the cavity after the blow assembly has been operatively engaged with the blow pin assembly. After the blowing operation has been completed, the blow assembly is operatively disengaged from the blow pin assembly and the cavity with the blown article is transported in a second station, the blow pin assembly traveling with the cavity. At the second station, an auxiliary blow assembly is operatively engaged with the blow pin assembly to circulate medium through the interior of the article.

Abstract: A portion of a plastic tube (16) heated to a temperature at which stretching induces a molecular orientation, is clamped in a sleeve (14), a fluid under pressure is introduced into the portion of tube and the sleeve is moved along the portion of tube to cause its progressive radial expansion until it makes contact with a mould (1).

Abstract: Apparatus for moulding an article (11) of thermoplastic material from a parison (10) in which certain parts (17,16) of the parison are re-formed while other parts (13,12,20) retain their shape. A difference in pressure is applied to the wall of the parison during the re-forming process. Material in the parison is also moved in the direction of those parts of the parison which are to be re-formed, whereby attenuation of the material may be avoided entirely, if so desired, also in those parts which are to be re-formed. The invention enables the parison for a bottle to be re-formed to an extent which is small by comparison with the thickness of the material, for example the so-called "neck support" ring and the so-called "pilfer proof" ring, starting with a tube of oriented material. In a device for the application of the invention the elements (22,21,25) are in contact with the parts (13,12,20) of the parison.

Abstract: The number of blow mold stations being associated with a blow wheel of a blow molding machine determines a large pitch of the mandrel receiving positions of the blow wheel. Contrarily the mandrels carrying the parisons are disposed very close to each other on the heating wheel which thus has a substantially smaller pitch. The larger pitch of the blow wheel shall be maintained throughout the complete machine to simplify the transfer of the parison. Accordingly the heating wheel receives the same pitch as the blow wheel including additional mandrel receiving positions which are served in a plurality of subsequent revolutions of the heating wheel.

Abstract: A technique is described for preparing molecular biaxially oriented hollow articles from thermoplastic materials. The invention involves forming a parison on a cooled core rod by injecting a hot thermoplastic material into a cavity formed by the core rod and a cooled injection mold, cooling the parison with low temperature coolant to a temperature within the orientation range of the thermoplastic material, transferring the parison to a stretch blow molding position and permitting the temperature of the parison to equilibrate itself. The parison is then stretched, oriented to yield the desired biaxially oriented article, cooled and ejected.

Abstract: This relates to a loader for loading preforms into collets of pallets in a blow molding machine wherein a plurality of preforms are simultaneously loaded into the blow molding molds during each operation of the machine. The loader includes a preform supply wherein there is a preform receptacle having a number of preform pockets corresponding to the number of preforms to be loaded in a pallet. A preform carrier is moved between a position underlying the preform receptable for receiving preforms therefrom to a position underlying a pallet presented to the loading station. The preform positioning device then engages the bottoms of preforms and moves the preforms up through the preform carrier into the lower end of the collets of pallets where they are automatically retained in place by spring loaded detents. This abstract forms no part of the specification of this application and is not to be construed as limiting the claims of the application.

Abstract: A method and apparatus of making hollow plastic articles are disclosed in which the preforms or other articles are sequentially molded from a continuous stream of plasticized resin supplied by an extruder. The preforms are formed sequentially in a plurality of molds and immediately transferred from the molds to blowing apparatus where they are blown into plastic articles. The molds are disposed in sets of two or more molds each, and the number of blowing apparatus units is equal to the number of sets of molds, with at least two sets of molds being provided. After the preform is formed in one mold of a set of molds, it is transferred while it is still hot to the corresponding blowing apparatus for that set while the extruded stream of plasticized resin is fed into the other molds to form other preforms.

Abstract: Apparatus for producing a tubular pre-moulding of a thermoplastic material, suitable for subsequent blow-moulding to form a container comprising a mold in which a future mouth portion and a portion of adjacent neck section of a tube are moulded to form a pre-moulding, preferably from two mutually joined blank parts, by an axial stretch operation and a blow-moulding operation, the parts in the transition between the mouth portions being severed by a cutting device in order to form two separate blank parts. A tubular pre-moulding is produced after closing one end of the particular blank part and, if necessary, reworking in order to obtain the requisite closing face at the other end.

Abstract: A thermoplastic, generally tubular parison for the blow molding of a thermoplastic container and a method and apparatus for same. The parison includes a finish or neck having a single helical thread extending less than 360.degree. about the circumference of the finish. The radius of the parison at any point on the outside surface is less than the radius through the crest of the helical thread, whereby the parison can be injection molded in an injection molding apparatus with an injection mold comprising all axially movable mold sections.

Abstract: A molding machine disclosed herein comprises a rotary disk having a required number of neck molds attached to the under-surface thereof, said rotary disk being located under the base plate, rotary disk capable of being intermittently rotated to thereby successively transport the neck molds to an injection molding stage, a temperature control state and a molded article releasing stage for continuous operation from the injection molding of parisons to the releasing of hollow molded articles. The present invention is characterized in that blow molds and mold opening and closing mechanisms therefor disposed movably up and down in the stretching and blow molding stage are moved up at the stretching and blow molding whereas moved down at the transporting the parisons and hollow molded articles.

Abstract: An article carrier is provided for blow molding equipment which permits relatively simple exchange of the article gripping chuck portion of the carrier. The carrier includes a carrier body, a spindle rotatably supported by the body, an article gripping chuck removeably attached to the spindle and seals between the chuck and the spindle and between the chuck and a preform retained thereby. The chuck is provided with article gripping levers preferably rotatably supported by ball and socket joints. The levers have preform grasping projections at one end and first and second ball ends at the other end. The first ball end mates with the chuck body socket and the second ball end is engaged by a lever actuating ring slidably mounted on the outside of the chuck body.

Abstract: The preform (1) for the production of hollow articles by blow-moulding possesses a profiled false neck (4) provided with a circular toothed collar (6), and during the thermal conditioning of the preform for the purpose of final blowing, the preform, held loosely by idling holding rollers (8) (9) at the level of the profiling of its false neck (4), is caused to rotate about its longitudinal axis by a toothed drive member (13) which cooperates with the circular toothed collar (6).

Abstract: A machine for the blow molding of synthetic resin hollow workpieces with a unit for shutting parted blow molds and with a turntable moved in steps, with a number of rests evenly spaced round the axis of the turntable for blown hollow workpieces. The rests may be moved into a handing over position in the parting plane (E) of the blow mold shutting unit and into at least one after-processing station. There is a blow stick which is supported by a blow stick carriage moved horizontally in this parting plane between the blow position at the blow mold shutting unit and this handing over position. The blow stick carriage is indexed in the blow position in a machine bed. The blow mold shutting unit has horizontal guides for the blow mold supports only at the side furthest from the blow stick carriage.

Abstract: Disclosed is a method and apparatus for orientation blow molding and heat setting of a thermally crystallizable polymer wherein the orientation blow molding is effected in a relatively low mass blow mold which is enclosed within a heated, high mass mold for transferring heat to the hollow article for heat setting; thereafter the outer mold is opened and the blow mold is cooled in a variety of methods in order to cool the heat set hollow article.

Abstract: A method and apparatus are disclosed for forming blown thermoplastic articles in which an extrusion head extrudes an essentially tubular parison of thermoplastic material. Sections of a preform mold are then closed around the parison, the sections having a preform cavity with a configuration such that one end of the parison is open after closing and the other end is enclosed. A core pin is next inserted into the open end of the parison and is utilized to compression mold the parison to form a preform. Heat is transferred from the parison through the inner and outer walls of the preform between the mold cavity and core pin during the compression molding step in order to thermally condition the preform and bring the temperature within the desired range. The sections of the preform mold are then opened and the preform is enclosed within sections of blow molds within a blow mold cavity. The preform is next expanded to the shape of the blow mold cavity.

Abstract: A method of heating a parison neck by stretching blow molding, wherein an injection molded synthetic resin parison is adjusted in temperature while holding a parison neck, by a neck mold for molding a parison neck, after which the parison is stretched and expanded to form a container such as a bottle, the method comprising at the time of adjusting temperature of said parison, heating a lower end of the neck mold and applying heat enough to prevent formation of an annular constriction in a molded product, to a border between a parison neck covered by the neck mold through the end of said neck mold and a body.

Abstract: An injection stretch-blow molding machine for producing hollow articles such as bottles by simultaneously performing the formation of a parison by injection molding and sharping of the parison by stretch-blow molding. The machine has an injection mold constituted by a male mold part and a female mold part and a stretch-blow mold constituted by a male mold part and a female mold part. The machine further has four neck molds capable of opening and closing to release and clamp the neck of the parison and arranged on a rotary body at a 90.degree. interval. The rotary body is rotatable to bring the neck molds successively through an injection position, heating position, blow position and a discharge position which are arranged at a 90.degree. interval. As the rotary body makes the 90.degree.

Abstract: A molding machine disclosed herein comprises a rotary disk having the required number of openable and closeable neck molds, said rotary disk being located on the underside of a base plate, said rotary disk being capable of achieving intermittent rotation to successively transport said neck molds to an injection molding stage, a temperature control stage, a stretching blow molding stage and a molded product releasing stage for continuous operation from the injection molding of bottomed parisons formed of synthetic resin to the releasing of hollow molded products such as bottles subjected to the stretching and blow molding.

Abstract: A process and apparatus for heat setting side walls of biaxially oriented thermoplastic resin containers to reduce shrinkage of the container and container treated by the process. Heating is by infrared radiation while shielding portions of the container. The apparatus comprises container handling systems to provide a fully automated system capable of being incorporated in present container production lines.

Abstract: This relates to a blow molding apparatus wherein in lieu of the mold halves closing on a preform and thereafter the blowing operation initiated, the preform is shifted into one of the mold halves and thereafter advance of the stretch rod into the preform and movement of the blow head to a position closely adjacent the preform is effected before the closing of the mold is completed. Such arrangement permits a reduction in cycle time. This abstract forms no part of the specification of this application and is not to be construed as limiting the claims of the application.

Abstract: Method and apparatus for the preparation of oriented hollow articles of moldable organic plastic material which is characterized by a rapid operating cycle and an inexpensive procedure. The disclosure teaches a streamlined operating cycle utilizing a reduced number of blow molds while retaining high productivity.

Abstract: An electrically heated sterilization chamber 9 for a hollow blow molding needle 15 is embodied in a half-mold 1A and exits directly into the mold cavity 3, 4. A three-way distributor core 11 enables the selective connection of the sterilization chamber to the mold cavity or to a circuit 21 comprising a vacuum source 35 and a source of sterile water vapor 37 coupled in parallel. The needle is initially sterilized by the hot water vapor, and thereafter maintained in a sterile state by the electrical heating and its confinement within the half-mold.

Abstract: A machine for high rate production of molecularly oriented thermoplastic bottles is disclosed. The machine is of the reheat-and-blow type. A blow molding station simultaneously blow molds article preforms arranged in matrices by modular article carriers for conveying the preforms and articles through the machine. The carriers are designed to retain the preforms throughout all operations of the machine from a preform load station through a thermal conditioning section, a blow molding station, and to a bottle eject station, thereby eliminating the need for other preform transferring apparatus. The article carriers together with the associated conveying apparatus comprise a sufficiently flexible structure that minor misalignments of the carriers with the blow molding mechanism do not adversely affect bottle production. Both loading of preforms and ejection of finished bottles are accomplished by operation upon matrices of preforms and bottles as defined by the carriers and conveyor lanes.

Abstract: Method for the preparation of oriented hollow articles of moldable organic plastic material which is characterized by a rapid operating cycle and a final article free from objectionable capacity. The disclosure teaches an injection molding station for controlled removal of parisons after altering the heat content thereof under conditions avoiding crystallization and thereby freeing the injection station for the formation of a second parison.

Abstract: An apparatus for removing a waste portion from a blow molded article is disclosed. The apparatus removes the waste portion while the article is enclosed within the blow mold and features a gripping structure for gripping the waste portion and a power assembly associated with the gripping structure to move the gripping structure from the article, thereby pulling the waste portion from its point of attachment with the article. The gripping structure includes two opposed gripping means which are arcuately movable about their respective pivot points. Each pivot point is laterally displaced from the gripping structure and positioned along a line extending through the shortest distance from the pivot point to that portion of the gripping structure which is closest to the attachment of the waste portion to the article.

Abstract: The invention relates to a tubular pre-moulding of a thermoplastic, suitable for subsequent blow-moulding shaping to give containers, and to a process and equipment for producing such pre-moulding. In a tube, future mouth portions and portions of adjacent neck sections are moulded to pre-mouldings, preferably from two mutually joined blank parts, by an axial stretch process and a blow-moulding process, the parts in the transition between the mouth portions being severed in order to form two separate blank parts. A tubular pre-moulding is produced after closing one end of the particular blank part and, if necessary, reworking in order to obtain the requisite closing face at the other end.

Abstract: A device for cutting off a sprue of a parison with a bottom is capable of cutting off the sprue in a heating furnace. Cutter plates for cutting the sprue and an outlet for discharging the cut sprue are disposed at the bottom of the heating furnace. Cutting off the sprue may thus be performed without changing the usual molding cycle of the hot parison molding method. The device may alternatively be applied to the cold parison molding method.

Abstract: An injection blow molding apparatus capable of achieving biaxial orientation and the produced article is disclosed. The apparatus features a transport table rotatable about and reciprocally movable along its center axis and at least an injection molding station and a blow molding station positioned adjacent to and around the transport table. There is at least one core rod mounted to the transport table, which core rod is moved from the injection molding station to the blow molding station by the table movements. The core rod coacts with the injection molding station to form an injection molded parison which is transported on the core rod to the blow molding station. At the blow molding station, a stretch pin mounted within the core rod is utilized to aid in the biaxial orientation of the final article blown at the blow mold station.

Abstract: A single injection blow molding apparatus for making a selected oriented finished product. The apparatus includes the support structure and an injection molding station where a parison is injection molded into a selected configuration. A core rod assembly cooperates in forming the parison which is formed about a first core rod. The parison is conditioned to an orientation temperature. A transfer system is on the support structure for removing the first core rod from the parison and transferring the parison to a blow molding station. The blow molding station is on the support structure and is provided for blow molding the parison while at orientation temperature into the configuration of the finished product. A second core rod assembly with a second core rod cooperates in blowing the parison into the configuration of the finished product.

Abstract: An apparatus for cooling a transfer mandrel on whose top portion a thermoplastic resin parison is mounted and which is rotatably engaged with the peripheral portion of a rotary table. The apparatus is arranged along the peripheral portion of the rotary table adapted to rotate oppositely to a heating means. The apparatus comprises a cooling block having a cavity through which cooling water flows and a concave surface opposing to the transfer mandrel which has a profile conforming to the cylindrical portion of the transfer mandrel, means for adjusting the position of the cooling block, and a spring which pushes a surface portion opposite said concave surface of the cooling block.

Abstract: A method and apparatus of making hollow plastic articles are disclosed in which the preforms or other articles are sequentially molded from a continuous stream of plasticized resin supplied by an extruder. The preforms are formed sequentially in a plurality of molds and immediately transferred from the molds to blowing apparatus where they are blown into plastic articles. The molds are disposed in sets of two or more molds each, and the number of blowing apparatus units is equal to the number of sets of molds, with at least two sets of molds being provided. After the preform is formed in one mold of a set of molds, it is transferred while it is still hot to the corresponding blowing apparatus for that set while the extruded stream of plasticized resin is fed into the other molds to form other preforms.

Abstract: Method and apparatus for forming oriented, blown objects of moldable plastic material requiring prolonged tempering cycles to obtain conditions suitable for orientation. Disclosure provides a multiplicity of tempering molds in spaced relationship to each other for retaining and tempering parisons prior to orientation and blowing in a tempering cycle, whereby the tempering molds receive and release parisons seriatim, and whereby the overall operating cycle is substantially unaffected by the number of tempering molds.

Abstract: A method and apparatus for blow molding a wide mouth container wherein substantially the entire container is multiaxially oriented in its formation. The method and apparatus produce this container in effectively a one station operation without the need for high pressure injection molding platens. The apparatus is useful in making non-oriented articles as well. One such multiaxially oriented article that may be blow molded is a container having the configuration of an oil can.

Abstract: This relates to a blow molding system wherein a plurality of preforms are simultaneously blow molded within a mold set with the preforms being carried by one or more carriers which move first to a loading station to receive preforms, then through an oven to heat the preforms, then into a mold set wherein the plural preforms are simultaneously blow molded, then to an ejection station where the blow molded articles are discharged, and finally back to the loading station. There are two mold sets which are part of a clamp which operates sequentially to open and close each mold set with one mold set being closed as the other mold set is being opened. The carriers may travel either in a single continuous path for sequentially positioning at first one mold set and then the other, or there may be two continuous circuits for the carriers in which event the two mold sets of the clamp may be different.

Abstract: Plastic bottle blanks (1) are rotated and conveyed neck down through a rotary thermal heating station (3), and neck up to a transfer station (5) and through a blow molding station (4), thus making it possible to simultaneously hold the blanks by their necks during the entire treatment and to easily remove the finished hollow bottles by gravity.

Abstract: A plant for producing articles by drawing-blowing of preforms in plastic material comprising a transport device for the preforms comprising independent supports (2,3) each receiving a preform and sliding in guides (1) forming a polygonal shape under the action of corner jacks (22, 23). The length of the path can be modified by adding portions of sliding rails (1) and the distance between centers of two adjacent preforms can be modified along the whole path.

Abstract: Method and apparatus for forming oriented, blown objects of moldable plastic material requiring prolonged tempering cycles to obtain conditions suitable for orientation. Disclosure provides a multiplicity of tempering molds in spaced relationship to each other for retaining and tempering parisons prior to orientation and blowing in a tempering cycle, whereby the tempering molds receive and release parisons seriatim, and whereby the overall operating cycle is substantially unaffected by the number of tempering molds.

Abstract: An injection stretch-blow molding apparatus is disclosed. The apparatus includes at least two preform conditioning stations, a molding injection station for initially molding the preform and a blow molding station. Each of the stations is preferably able to process an equal number of preforms at once. The apparatus also includes a turntable and preform supporting jaws connected to the turntable for transporting consecutive sets of preforms made at the injection station to the two conditioning stations alternately, and for transporting sets of preforms alternately from each of the conditioning stations to the blow molding station. This allows all four stations to operate at their respective full capacities, even though conditioning at the conditioning station requires up to twice as long as injection molding or stretch-blow molding.

Abstract: A mould for use in the manufacture of thermoplastics eg PVC pipe by radial expansion of a pipe blank, the mould comprising a cylindrical central portion 10 and two removable mould end portions 11, 12. The pipe blank 14 is located centrally within the mould by mandrels 13 within each mould end portion 11, 12. Water inlet/outlet ports 15, 16 are provided in each mould end portion 11, 12 to admit water to and remove it from the region between the blank 14 and the mould walls, and the mandrels 13 are hollow to permit inlet/outlet of water through the interior of the blank 14.

Abstract: In an injection molding apparatus in which an injection device imposes a touching force on an injection mold in a direction perpendicular to the direction of the clamping force for closing the mold cavity, an apparatus is provided which imposes a force on the injection mold of an equal magnitude an in an opposite direction to the injection device touching force. The apparatus can be a hydraulic ram which is driven by fluid from the same line that supplies fluid to drive the touching motion of the injection device.

Abstract: Disclosed are apparatus and a method for forming multi-directionally oriented plastic articles by shearing a thermoplastic material in a non-linear shear pattern while the material is at a temperature conducive to orientation and further processing the material by known plastic forming techniques to form an article in which the material remains oriented. More specifically, thermoplastic material is plasticized and accumulated in an amount at least sufficient to form the article, and the material is expressed under pressure from the accumulated body to and through an orifice. The material is non-linearly sheared prior to its issuance from the orifice to induce orientation stresses into the material, and, during shearing, the material is at a temperature which is conducive to orientation.

Abstract: Apparatus and method for forming oriented, blown objects of moldable plastic material requiring transfer of parisons first to tempering molds and then to finishing molds. Disclosure provides a plurality of injection molds for producing a plurality of parisons in spaced relationship to each other and a multiplicity of blow molds in spaced relationship to each other wherein the blow molds have a different center spacing than the injection molds. Disclosure provides means for varying the center spacing of the parisons.