Abstract: Method for manufacturing a plastic fuel tank by moulding a parison in a mould, in which method the parison is locally deformed during moulding of the parison in order to obtain an impermeable hollow built-in connector provided with a screw thread, and to do so by means of a concave counter-form and a convex form that can penetrate the counter-form, these two pieces being secured, one to the mould and the other to a core located inside the mould, or vice versa, and at least one of these pieces being provided with a screw thread, the moulding of the connector taking place by the convex form penetrating the concave counter-form.

Abstract: The present invention includes a shopping cart frame with mounting bracket units connecting caster wheels and having a plate secured underneath the base with a caster pin receiving hole and spaced-apart flanges flanking the hole and abutting on the base; a shopping cart with a support bar between side uprights for forwardly propping up a primary basket and rearwardly hanging a secondary basket; a cart with a plastic basket having rear structural tubes sheathing the frame's side uprights and being secured thereto; a modular method of making different cart models by providing multiple sets of components with cooperating mounting surfaces for interconnection; a modular plastic basket with a hooked-on suspended tray and a channel-shaped overlay detachably snapped over the edge and tray; a one-piece molded plastic basket with independent branching tubular sections with different thicknesses; and an independent gas-assisted injection method for molding a one-piece plastic basket.

Abstract: A method of making a wide mouth, blow molded PET plastic container having an externally threaded neck, the diameter and wall thickness of the neck and threads have a critical relationship to the diameter and wall thickness of the preform used to blow the intermediate article of which the container is a part. A PET plastic container having a threaded neck with a wall thickness of within the range of 0.032 to 0.038 inches.

Abstract: Air cartridge devices and methods of using the air cartridge devices are provided. In an embodiment, the present disclosure provides an air cartridge device comprising an elongated cylindrical shaft defining a first elongated end portion and a second elongated end portion. The second elongated end portion can defining one or more apertures. The air cartridge device can be incorporated into a blow molding apparatus for blow molding bottles.

Abstract: A blow molded synthetic resin bottle has a body and an elongated neck with the body providing a shoulder extending about the base of the neck. The neck has a first collar extending thereabout spaced adjacent the shoulder and at least one additional collar extending thereabout adjacent the upper end of the neck. The resin in the neck is substantially unoriented. To produce the bottle, a synthetic resin preform is injection molded with a generally tubular body and the elongated neck. This preform is placed in a blow mold cavity having a body receiving portion and a neck receiving portion that has a recess extending thereabout seating the first collar therein. The additional collar is disposed outwardly of the mold cavity and is disposed on the upper surface of the mold.

Abstract: Injection stretch blow molded (ISBM) articles and methods of forming the same are provided herein. In one embodiment, the ISBM articles generally include a propylene based random copolymer having a molecular weight distribution of from about 9 to about 20. In another embodiment, the ISBM articles generally include a propylene based random copolymer formed from a Ziegler-Natta catalyst including a succinate internal donor.

Abstract: Apparatus and method for making a molded plastic article having a stretched and crystallized neck finish. In one embodiment, a series of platforms are carried by a conveying apparatus for transporting a series of molded plastic articles along a predetermined path of travel through one or more treatment stations. At a finish widening station, the molded article, having a relatively wide and thin-walled blow-molded body portion, and a relatively narrow and thick-walled unexpanded neck finish portion, is positioned to enable insertion of a mandrel into an open top aperture of the finish portion to widen the finish. The mandrel may include a lower heated tapered portion for expanding the finish, and an upper cooled body portion on which the expanded finish may be cooled. The article may then be sent to a finish crystallizing station having a heating device that heats the widened finish portion for a time and temperature selected to crystallize at least a portion of the widened finish.

Abstract: Provided is a process for the production of heat-resistant hollow articles that does not cause the deformation of injection-molded products or the incapability of the same being taken out of a mold. A mold 1 that comprises a female mold portion 3 having a concavity 2, a male mold portion 5 having a convexity 4, and a stripper plate 7 having an edge-forming part 6, is heated so that the temperature of a surface facing a cavity 8, which is enclosed by the concavity, convexity, and edge-forming part becomes the crystallization temperature of a polylactic acid containing resin, and the polylactic acid containing resin is injected via a gate 9.

Abstract: A method of making a container preform includes providing a mold core having at least one surface recess in the form of negative-mold indicia, and molding a preform around the core such that the preform has internal raised indicia formed by the at least one recess in the core. The preform preferably subsequently is blow-molded to form a container having the raised indicia on an inside surface of the container. This raised indicia on the inside surface of the container may be viewed from outside of the container to confirm that the container is genuine. In accordance with various embodiments of the disclosure, the raised internal indicia may be on the bottom wall, sidewall, shoulder and/or neck of the container.

Abstract: An overmolded preform and a container blow molded from the same are disclosed, wherein the overmolded preform and the overmolded container include an outer foamed layer.

Abstract: A molding apparatus and method for creating a molded object that incorporate a mold with a mold cavity, a mold core disposed within the mold cavity, and a reciprocating sleeve insertable between the mold core and the mold cavity. The apparatus and method include injecting molten plastic between the core and the sleeve forming a preform object, then retracting the sleeve and expanding the preform object by blow molding, using pressurized fluid provided through jets in the mold core, until the object expands to fill the mold cavity. The apparatus and method further include thermal conditioning of the sleeve when it is retracted to create a temperature profile in the sleeve that is then applied to the preform object, thereby providing finer control of the temperature profile of the preform object before the final blow molding step.

Abstract: A dual-texture article comprises at least two same or different polymers having same or different melt flow rates that cause co-moulding/over-moulding of the polymers upon injection stretch blow moulding. The article has at least two interlocked combined layers. A method of manufacturing the article includes providing an intermediate layer of plastics material with at least one opening therein, injection moulding an outer layer of plastics material upon the intermediate layer to form a dual-layer insert therewith, placing the dual-layer insert into a blow moulding cavity, and blow moulding a plastics pre-form in the blow moulding cavity such that a portion of the pre-form engages with the intermediate layer and wherein the plastics pre-form connects with the outer layer through said opening.

Abstract: The invention relates to a container which is formed at the upper portion of the main body with the foldable portion having folding lines for easily folding the foldable portion. Processes for forming the container include a first step for forming a perform by injection molding and a second step for forming the finished product having the foldable portion by blow molding.

Abstract: The invention relates to a manufacturing inspection method for the cyclic production of injection-molded parts in multi-cavity casting molds involving a row-by-row monitoring of the injection-molded parts after they are removed from the casting molds, said monitoring being effected by sensors, particularly, photoelectric barriers. The invention also relates to an inspection device used during the cyclic production of injection-molded parts in multi-cavity casting molds involving a row-by-row monitoring of the injection-molded parts after they are removed from the casting molds, said monitoring being effected by sensors, particularly, photoelectric barriers.

Abstract: A method and apparatus for injection molding an article including a radially extending child resistant feature. Finish block halves are provided that include a pocket and that are closable together to form a neck-finish mold cavity. Mold body halves are provided that include a core portion and that are closable together to form a body mold cavity. The core portion is advanceable toward the pocket to cooperate therewith to define a cavity for forming the child resistant feature. The core portion may be integrally formed into one or more of the mold body halves, or may be separately mounted and relatively movable with respect thereto.

Abstract: A seamless collapsible container has a molded finish, configured and adapted for sealing with a closure and, optionally, for attachment to a dispensing apparatus, and a seamless, blow molded body portion, comprising an inner surface, an outer surface, and a wall, where the wall is sufficiently thin to allow the body portion to collapse, and the molded finish and at least an inner layer of the body portion together comprise a seamless, single piece of thermoplastic material. The seamless collapsible container may be used in such applications as a bag-in-box, a carton liner, and a beverage pouch.

Abstract: The invention provides a novel thermoplastic molding process useful in the manufacture of hollow, deformable thermoplastic articles such as hollow doll heads. In the process of the instant invention, a parison is formed at a first injection station and is transferred to a blow mold station. At the blow mold station, the parison is transformed into a hollow, deformable thermoplastic article through application of a vacuum and gas injection. Articles made by the process of the instant invention have a highly realistic appearance and texture.

Abstract: A multiple cavity bottle is manufactured by injection molding a preform having a helical septum and blow molding the preform to create a bottle having a helical septum separating the bottle into two cavities. The helical septum is molded with a twist sufficient to accommodate a contact point size for stretch rods used in blow molding. Blow molding is then accomplished by inserting at least two stretch rods from the top end of the preform to the contact points, heating the preform to a softening temperature, extending the stretch rods to stretch the preform and introducing gas pressure into the preform to stretch a blow molding portion into a final bottle shape within a mold.

Abstract: Injection molding method and apparatus for ejecting a molded plastic preform from a mold. A first lifting structure and/or step is configured to have an inner surface with an area for sealing and aligning with a complementary surface on a core, and to have an upper surface with an area for sealing and aligning with a complementary surface on a second lifting structure, said upper surface of said first lifting structure being configured to lift a molded plastic preform from the injection mold in a lifting direction for a first period of time, the lower portion of the molded plastic preform lying in a plane substantially perpendicular to the lifting direction. A second lifting structure and/or step is configured to have an inner surface configured to lift an outer surface of the molded plastic preform from the injection mold in the lifting direction for a second period of time, the outer surface of the molded plastic preform including structure lying in a plane substantially parallel with the lifting direction.

Abstract: Apparatus for handling and cooling preforms, comprising a collection element provided with a plurality of receptacles arranged according to a definite geometrical distribution pattern and adapted to accommodate a corresponding plurality of preforms, as well as a cooling element. The collection element is displaceable from a preform loading position to several distinct positions, arranged above the cooling element, which is provided with a plurality of cups collected into a plurality of distinct, but similar geometrical distribution patterns that are translated with respect to each other in such a manner as to prevent them from interfering with each other.

Abstract: A container is made in two stages from thermoplastics material. In the first stage a preform (1) is injection moulded, the mould parts easily releasing a tubular body (2) with a closed end and an outwardly projecting rim (3) at the open end. In the second stage the still heated preform (1) is blow moulded, possibly with some preliminary mechanical stretching, with the blow pin (13) seated in the open end of the body (2) and the preform (1) held by the other part (7) of its rim. The wall of the body (2) is expanded, and immediately below the open end it is stretched outwardly to meld with the underside of the inner part (5) of the rim. The resultant container thus has a mouth defined by an inset lip. It may be of paint tin form, with a drip groove (9) around the mouth.

Abstract: A method of making a plastic container having a body and a finish with at least one external thread includes injection or compression molding a plastic preform having a body and a finish with at least one external thread, blow molding the body of the preform to form the body of the container, and either prior to, subsequent to or both prior and subsequent to blow molding the container body, expanding the injection or compression molded preform finish to form a container finish having at least one injection or compression molded external thread. In the preferred embodiments of the invention, the finish is expanded after the container body is blow-molded. The invention can be implemented to expand a narrow-neck preform or container finish to a wide-mouth preform or container finish.

Abstract: A parison (110) for a container having a substantially constant wall thickness, the container having a base, a top edge defining a round opening, the top edge defining a plane which is not parallel to the plane of the base, a neck portion disposed at the same angle as the plane defined by the top edge, a front outer surface, and a rear outer surface having a lower portion and an upper portion. The parison comprises a cylindrical upper neck portion (140) having a cavity extending therethrough, the upper nock having a top surface (145) edge defining a top plane. The parison also has a hollow, elongated body portion (150) having a closed lower end (155) and an upper end (160), the lower body portion having a major axis extending in a direction parallel to the longitudinal axis of the cylindrical upper neck portion, and having a front wall (170) and a rear wall (175). The front wall is thicker than said rear wall. Also included in the invention is a method of producing a bottle (100) from the parison.

Abstract: This invention relates to the post-formation processing of extruded or injection molded profiles in an economic manner without the need to purchase a blow molding machine, yet still effect post-formation radial expansion or contraction by the application of sufficient degree of heat or the performing of the operation sufficiently quickly to permit the utilization of the retained latent heat from the extrusion or injection molding process.

Abstract: The present invention relates to an injection stretch blow molding method of forming a cylindrical narrow mouth container comprising the following steps; injection molding a preform having a body portion integrally molded with a neck portion wherein the body is formed thicker-wall and larger outside diameter than the neck portion from a closing surface between a neck mold and an injection cavity mold, and having a step-out portion, wherein an upper surface of the step-out portion is formed by the closing surface of the neck mold between the neck portion and the body portion and the step-out portion has a smaller outside diameter than the body of the container, and stretch blow molding the preform to the container in a blow cavity mold, wherein a body portion of the container is formed thin-wall from around the upper surface of the step-out portion, and the step-out portion and an expanded portion around the upper surface of the step-out portion form a shoulder portion of the container flat, and also the outsi

Abstract: A method of manufacturing a container for containing an oxygen sensitive product from a heated plastic by blow molding the plastic with a compressed gas that is inert to the oxygen sensitive product. The heated plastic may contain an oxygen barrier layer or an oxygen scavenging component. The gas is also inert to the oxygen scavenging component, if it is present. An exemplary compressed gas is nitrogen gas. The blow molding may be extrusion blow molding, injection blow molding or stretch blow molding. The plastic may be, for example, a polyolefin, a nylon, or a polyester.

Abstract: The method involves making a hollow blow molded thermoplastic article having an integral handle. An unblown preform of polyethylene terephthalate (PET) is inserted into a blow mold and thereafter stretched by a stretch rod. Blow gas is then injected into the interior of the preform when the blow mold is closed and the preform is at a stretch temperature. After the preform is blown into the shape of the bottle in the mold, blow gas is discharged from the stretch rod onto an interior wall surface where the handle is to be formed. Heated movable mold segments are then advanced within the blow mold from a first retracted position to a second position thereby compressing an interior wall surface of the article into contact with a facing interior wall surface of the bottle to bond the surfaces at an elevated temperature and form an integral handle extending from the exterior wall of the blow molded article.

Abstract: Disclosed is a polyester composition comprising:

Abstract: A dimensionally-stable, injection-molded portion of a blow molded intermediate article is engaged by a conveyance mechanism of a trimmer to controllably drive the intermediate article within the trimmer to permit accurate and high speed severing of the injection molded portion and moil from a blown finish container body. An injection-molded, closed end preform is provided having a neck finish with an internal and/or external peripheral drive surface. The preform is utilized to form an intermediate article including a container body and moil. The injection-molded neck portion of the intermediate article remains substantially unchanged from its as-manufactured preform condition and provides a dimensionally stable surface for use in driving and rotating the intermediate article within the trimmer.

Abstract: A joint boot which is made of resin comprising a small-diameter cylinder part, a large-diameter cylinder part and a bellows part interlinking both is molded by injection blow molding. While forming the bellows part by blow molding, the exterior boundary between an injection molding section and a blow molding section is set in a cutout portion formed in a shoulder portion of the recess for fixation.

Abstract: A preform (207,301), and a container (201,312,319) blown therefrom in a two stage process (as defined in the specification) is disclosed having a loop (202,304,313) defining a handle portion of the resulting blown container and wherein the loop is integrally connected by both a first end (306) and a second end (308) to respective first location (307) and second location (309) of the preform during manufacture of the preform.

Abstract: Sleeve molding apparatus and methods for making multi-layer injection molded plastic articles in successive mold cavities. In a first molding step, an inner sleeve is molded on a core in a first mold cavity, which may comprise a full body length sleeve or only a partial sleeve, such as an upper neck finish portion. The sleeve and core are withdrawn from the first mold cavity while the sleeve is still warm, and transferred without substantial delay to a second mold cavity for injection molding an outer layer which bonds to the inner sleeve. By transferring the sleeve at an elevated temperature into the second mold cavity, an improved bond is formed between the inner sleeve and outer layer which resists separation during a later reheat stretch blow molding step, and/or in use of the resulting article. In a preferred embodiment, a pasteurizable beer container is provided having a finish-only sleeve of a PEN polymer.

Abstract: The method and the device are used for blow forming containers of a thermoplastic material. The preforms that are used are first temperature treated and then shaped into containers in the area of at least one blow station. Moulds to define the container shape are held by mould supports. At least two preforms are simultaneously shaped into containers within each blow station. Positioning of the preforms is done such that the preforms assume a positioning relative to one another when entering the blow station that differs from the positioning during the blow forming process. Spacing of the preforms relative to one another is changed during transport between entry into the blow station and blow positioning. In addition to this first change in spacing, a second change in spacing between adjacent preforms is performed relative to one another.

Abstract: A method of making a plastic container having a body and a finish with at least one external thread includes injection or compression molding a plastic preform having a body and a finish with at least one external thread, blow molding the body of the preform to form the body of the container, and either prior to, subsequent to or both prior and subsequent to blow molding the container body, expanding the injection or compression molded preform finish to form a container finish having at least one injection or compression molded external thread. In the preferred embodiments of the invention, the finish is expanded after the container body is blow-molded. The invention can be implemented to expand a narrow-neck preform or container finish to a wide-mouth preform or container finish.

Abstract: The biaxially oriented hollow bodies are obtained by employing random propylene terpolymers which comprise ethylene (0.5 to 5% by weight) and 1-butene (2 to 12% by weight), which have a melting temperature of 120 to 150° C., which are degraded by a free radical generator and which have a degradation factor A of from 1.5 to 10, the said factor being represented by MFIg/MFIi, in which MFIg is the melt flow index of the degraded terpolymer (of between 3 and 30 g/10 min) and MFIi is the melt flow index of the initial terpolymer (of between 2 and 15 g/10 min). The process for the manufacture of the biaxially oriented hollow bodies is by injection stretch blowmoulding. The biaxially oriented hollow bodies are used for packaging.

Abstract: A system and method for making a specialized preform and for fabricating a container from the specialized preform includes a first preform molding assembly in which a preliminary preform is molded so as to have a first sidewall portion that is thicker than the surrounding sidewall areas. A final preform is molded from the primary preform in a second preform molding assembly, wherein fluid pressure is utilized to mold the thickened first sidewall portion into a lateral projection that corresponds and size in shape to a handle structure that is desired in the final container. The specialized final preform is then positioned within a container mold that is constructed to pinch the lateral projection during blowmolding of the final container so as to define an integral molded handle portion having a central sealed slug area that is later removed.

Abstract: A molding system and related method for forming a molded article, such as a container, is disclosed. In one embodiment, the injection material is supplied though a side gate and drawn into the mold cavity using a vacuum assist and optional heating of the mold portions, if necessary. This creates a preform having a closed end with a smooth outer surface without gate marks or other vestiges of the injection molding process. The preform is then blow molded to form an article or container having a smooth outer surface adjacent to a closed end thereof.

Abstract: Injection stretch blow molded containers are obtainable from olefin polymers, comprising homopolymers of propylene or copolymers of propylene with other C2-C10-alk-1-enes, which are obtainable by polymerizing the corresponding monomers with metallocene catalysts. Processes for producing injection stretch blow molded containers from olefin polymers, and also the use of olefin polymers for producing injection stretch blow molded containers, are described.

Abstract: Method for manufacturing plastic bottles, including the step in which respective preforms are removed from the respective moulds, and the step in which said preforms are transferred into temperature conditioning stations for a predetermined period of time, during which said preforms are caused to undergo an asymmetrical heat treatment that is effective in heating in a different manner a preform sector having an angular spread of a definite value that is anyway not less than 180°. The method includes the step in which said surface sector of the preform is heated up with the help of heating means that are partially arranged in a crown-like manner around the respective preform.

Abstract: A multilayer preform having at least a medium or intermediate gas barrier layer is prepared in advance by the injection molding of this preform in a predetermined shape that corresponds to the shape of a finished molded product. The body portion of this preform is heated to a blow moldable temperature. The heated preform is set in a primary blow mold (12), and is blow molded in the biaxial orientation to give a primary molded intermediate (5). The primary intermediate (5) is then heated to deform it forcibly by thermal shrinkage and thereby to give the secondary molded intermediate (6). The shrunken secondary intermediate (6) is set in a secondary blow mold (13), and is subjected to the secondary blow molding in the biaxial orientation to obtain a finished molded product, which is fixed thermally to give heat history to the PET resin.

Abstract: In a single-row and expandable into a multi-row stretch blow molding method and apparatus, at least one row of tray plates in a tray unit is used to collect molded preforms ejected from the opening clamp of a preform-molding unit, transfer the preforms with or without transfer beads out of the molding area and align them with the center row distances of the downstream processing units. At least one robot having a universal gripper assembly is used to pick up either all or consecutively fractions of the preforms align them to the center distances of the blow mold cavities to place them at variable time intervals into a conditioning, stretch blow molding and oriented discharge unit, releases finished hollow articles and returns to a waiting position at the preform-molding and tray unit again at the preform mold's center distance independent of the preform-molding cycle. Simultaneously, component transfer devices may pick up external components, i.e.

Abstract: A method and apparatus for stabilizing a blow molded plastic preform and container in a blow mold during a demolding operation. The blow mold has a first mold section, a second mold section, and a mandrel. The mandrel cooperates with a pair of spring loaded jaws slidingly coupled to one or both of the mold sections. With the mold sections in their fully open position, the mandrel with an attached preform and/or container travels into the blow mold. During the final stage of closing the mold sections, the jaws contact the finish and restrain the container. As the mold sections begin to open, the jaws prevent any movement of the container relative to the mandrel.

Abstract: The invention provides a novel thermoplastic molding process useful in the manufacture of hollow, deformable thermoplastic articles such as hollow doll heads. In the process of the instant invention, a parison is formed at a first injection station and is transferred to a blow mold station. At the blow mold station, the parison is transformed into a hollow, deformable thermoplastic article through application of a vacuum and gas injection. Articles made by the process of the instant invention have a highly realistic appearance and texture.

Abstract: The present invention comprises a method for producing a tube preform using an injection moulding method. The inventor of the present invention has found that in the case of using an injection moulding method to produce tube preforms which can be constructed with either one layer or a plurality of layers, and of subsequent extension, in particular by heating the preform, and biaxial expansion by means of compressed air, a tube can be obtained which, on the one hand, has a tube shoulder with the strength required by industrial thread and, on the other hand, has a lateral surface which exhibits the softness desired for a tube.

Abstract: An injection blow-molded disposable tumbler is formed from a polymeric material and includes a fortified upper rim having a thickness greater than the adjacent sidewall. The tumbler may be formed of a variety of resinous materials and exhibits improved toughness and crush resistance as well as aesthetic qualities particularly desired by consumers. In a particularly preferred embodiment, thick-walled polycarbonate tumblers are prepared from hydrolysis-stabilized polycarbonate compositions while minimizing molded-in stress. In still further embodiments, nanocomposites compositions are used to form the containers of the invention.

Abstract: A core rod positioning device and method for controlling the distribution of material in products formed by injection blow molding machines is provided. The core rod positioning device has a sleeve having an outer surface defining an interior surface of an article molded using the core rod assembly. The sleeve also has an interior surface and a mandrel is located within the sleeve. Portions of the mandrel define a first passageway therethrough and which terminates at a port located in the exterior surface of the mandrel. The exterior surface of the mandrel cooperates with the interior surface of the sleeve thereby defining a second passageway between the sleeve and the mandrel. An adjustment mechanism is operably coupled to the mandrel allowing the mandrel to be adjusted laterally relative to the sleeve.

Abstract: There are various ways to latch a closure onto a container. It has been found that for blowmolded containers that the support flange for the bottle preform can later be used as a part of the latch mechanism to secure a closure onto the container. Preforms have a support flange by which the preform is handled prior to being placed into the mold and in the mold. Prior to being placed in the mold, the preform is heated to about 85° C. to about 200° C. During this time and in the mold, it will be supported by the support flange. This support flange is used after the container is blown and filled as one part of the latching mechanism of the closure. The closure will have a portion that is an interference fit with the support flange of the bottle to thereby secure the closure to the bottle.

Abstract: An efficient and cost-effective method of designing and manufacturing a plastic blow molded container having highly artistic sculptural relief. Computer software is utilized to graphically design a container skin shape, create 2-D artwork designs, add 3-D relief to the artwork designs, and apply the artwork to the container skin to develop a desired container. The graphics data of the desired container is utilized to make blow molds which, in turn, are utilized to blow containers. A preferred container is disclosed which has a dome with an intricate fruit basket design.

Abstract: The present invention provides a method of making laminated bottles each having an outer layer and an inner layer capable of delaminating from the former layer. The method consists of the step of injection molding an outer preform from a molten first resin, and the next step of injection molding an inner preform inside the outer preform, using a molten second resin. The method further has the final step of blow molding a parison composed of the outer and inner preforms so as to form each laminated bottle. The second resin has a melting point lower than that of the first resin, nevertheless and contrarily to the prior art, precise parisons affording satisfactory lamination can now be prepared by the injection molding steps. In addition, ventilation holes are formed in the outer layer readily and surely without damaging the inner layer.

Abstract: The invention concerns a device for producing thermoplastic containers, in particular bottles, by the blow-molding or stretch blow-molding of a preheated preform. The device comprises at least one mould consisting of two half-molds (2) each supported by a mould carrier, the two mould carriers being movable relative to each other. Each half-mould (2) comprises a shell holder (9), supported by the respective mould carrier, and a shell (7) which is equipped with a half-impression (8) of the container to be obtained and can be rendered integral in a detachable manner with its shell holder (9) by rapid-fastening means (19-23). The shell (7) and the shell holder (9) are of complementary shapes such that they contact each other at least partially for heat conduction purposes whilst the pipes and connections for circulating and/or heating fluids are provided in the shell holder alone.