Abstract: A molding apparatus provided with a transfer capable of transferring a heavy-weight mold clamping device. The molding apparatus that molds a molded product, includes: a mold clamping device clamping a parison extruded from an extruder to obtain a molded body, a transfer rail to support the mold clamping device in a transferable manner, and an electric cylinder to transfer the mold clamping device along the transfer rail. The mold clamping device includes first and second platens for holding a die, and a clamping drive unit for driving the first and second platens closer to or separated from each other, the electric cylinder includes a motor having an output shaft and a feed screw mechanism that converts the rotary motion of the output shaft into a linear motion.

Abstract: A method for shaping a preform made from thermoplastic material, and a facility for implementing the method, comprising the following steps: a) providing a preform made from thermoplastic material having a surface; b) supplying thermal energy to the preform by radiation in such a way as to make it ductile; and c) shaping the ductile preform inside a forming mould. Step b) further involves simultaneously spraying a gaseous fluid onto the surface of the preform in order to preserve the surface.

Abstract: A molding unit for the manufacturing of a container from a blank made of plastic material includes: a mold equipped with a wall and a movable insert; and at least one boxing system including a cylinder that is integral with the insert. The boxing system includes: at least one solenoid valve mounted on a primary fluid circuit, with this solenoid valve including a fluid outlet connected to a primary chamber and that defines a variable passage section based on an electric control signal applied to the solenoid valve; and a processing unit connected to the solenoid valve and programmed to vary the electric control signal applied to the latter.

Abstract: The invention relates to a method for producing a container (2) filled with a liquid product in which a preform (1) consisting of a thermoplastic material is stretched after a thermal conditioning with a stretching rod (11) and is shaped in an inflation process to the container (2), wherein the inflation process comprises a pre-blowing phase in which a fluid of a first pressure level is used for the inflation, and comprises a main blowing phase in which a fluid of a second pressure level that is greater than the first pressure level is used for the inflation and is characterized in that the fluid used in the pre-blowing phase is a blowing gas and that the fluid used in the main blowing phase is the product. Furthermore, the invention relates to a device for carrying out a method according to the invention.

Abstract: A method for manufacturing a double-walled tube is provided. The method comprises the extrusion of two tubes wherein one tube is inside the other. A first mold is provided around the outside of the outer tube and a support provided along the inside of the inner tube. Fluid is then injected into the cavity between the inner and outer tubes to mold the outer tube against the first mold.

Abstract: The invention relates to a method for producing hollow bodies from thermoplastic material comprising the shaping of at least one tubular preform or at least two two-dimensional, web-like preforms of plasticated thermoplastic material into a substantially closed hollow body, for example in the form of a fuel tank for motor vehicles.

Abstract: A method for the shaping of plastics material pre-forms into plastics material containers, wherein the plastics material pre-forms are introduced into a blow mould and are expanded to form the plastic bottles by being acted upon with a gaseous medium in the blow mould, includes the steps of: preliminary blow moulding by acting upon the plastics material pre-forms with a first pressure; intermediate blow moulding of the plastics material pre-forms at a second pressure which is higher than the first pressure; and final blow moulding of the plastics material pre-forms at a third pressure which is higher than the second pressure, wherein at least the second pressure is varied during a working operation.

Abstract: The invention relates to a branched polyamide prepolymer obtained or obtainable by polymerization of a polyamide forming monomer mixture, comprising AA-BB repeat units and branching units derived from diamines (monomer A) dicarboxylic acids (monomer B), and/or a salt of A and B, and a higher functional monomer (monomer C) present in a molar amounts defined by formula I and formula II: MC=(Q/FC)*(MA+MB) (Formula I) and R=((MA*2)+(MC*FCA))/((MB*2)+(MC*FCB)) (Formula II) wherein—MA, MB and MC represent the molar amounts of repeat units derived from the monomers A, B and C, respectively;—FC represent the functionality of monomer C, and is equal to FC-A+FC-B;—FC-A is the number of the amino functional groups comprised by monomer C;—FC-B is the number of carboxyl functional groups or precursor groups thereof comprised by monomer C;—Q is a number in the range of 0.06-1.00; and—R is a number in the range of 0.7-1.

Abstract: A method for fabricating a repair laminate for a composite part having an exposed surface includes applying a bonding material to the exposed surface and forming an uncured ply stack assembly on the bonding material. The uncured ply stack assembly is formed by forming and compacting a series of uncured ply stacks. The ply stack assembly and bonding material are then cured.

Abstract: An apparatus for molding plastic preforms into plastic containers, includes a clean room, at least one blow station having a blow mold for shaping the plastic preforms by at least one process pressure, and a venting device for venting or reducing the process pressure into the atmosphere. The venting device has at least one venting valve through which pressure can be vented into the atmosphere via a sound absorber, and a pressure drop safety device for closing the venting valve before the atmospheric pressure level on the venting device is reached.

Abstract: A method of manufacturing a component having first and second layers, the first and/or second layers including one or more depressions provided on a surface of the respective layer. The method including: arranging the first and second layers so that they face one another and with the depressions on inner facing surfaces of the layers; diffusion bonding the first and second layers together about their edges; applying a first differential pressure across each of the first and second layers to evacuate an inner space defined by the layers, thereby forming one or more depressions on an outer facing surface of the first or second layer; and applying a second differential pressure across each of the first and second layers to expand the inner space defined by the layers.

Abstract: A system (1) for transforming plastic parisons (10) into plastic containers (10a) with a clean room (20), with at least one blow station (8) comprising a blow mold for shaping the plastic parisons (10) by means of at least one process pressure (p1, p2, pi) and with a venting device (3) for venting the process pressure, or a process pressure reduced to recovery pressure (R), into the atmosphere (U), in which the venting device (3) comprises at least one gas pressure changing device (4). According to the invention the gas pressure changing device (4) can adjust and maintain a pressure difference between the clean room (2) and the venting device (3).

Abstract: A blowing mould array includes a blowing mould unit forming a cavity, inside of which plastic preforms are expanded to plastic containers. The blow mould unit includes a blowing mould retainer having at least two mould retainer elements for accommodating parts of the blowing mould unit, and a locking mechanism to arrest at least one part of the blowing mould unit against at least one mould retainer element. The locking mechanism includes an engagement element that can be pivoted and/or shifted relative to a default axis, which in an arrested state abuts a segment of a part of the blowing mould unit. The locking mechanism has an actuating element to loosen the arrest between the mould retaining element and the blowing mould unit. Actuation of the actuating element is coupled with actuation of the engagement element.

Abstract: A bow wave in a composite laminate generated during part consolidation is reduced by transmitting atmospheric pressure loads to a region of the part having low compaction pressure due to bridging of a vacuum bag at an edge of the part.

Abstract: A stretch blow molding system (200) is provided. The stretch blow molding system comprises a cylinder (201) including a movable stretch rod (202) and a blow-mold valve (204). The blow-mold valve (204) comprises a first fluid port (204a) in fluid communication with a first pressurized fluid source (364a). The blow-mold valve (204) also includes a second fluid port (204b) in fluid communication with a second pressurized fluid source (364b). A third fluid port (204c) of the blow-mold valve is in fluid communication with the cylinder (201) and selectively in fluid communication with the first fluid port (204a) and the second fluid port (204b).

Abstract: A resin laminate manufacturing method includes providing a pair of split mold blocks one of which has a cavity provided with a plurality of protrusions extending toward the other mold block, preparing two molten thermoplastic resin sheets each having an adjusted thickness, feeding the two molten thermoplastic resin sheets between the pair of split mold blocks with a predetermined gap left therebetween, forming a hermetic space between one of the sheets and the cavity of the one mold block opposed to an outer surface of the one sheet, sucking air in the hermetic space from the side of the one mold block, pressing the outer surface of the one sheet against the cavity of the one mold block to shape the one sheet, forming cup-shaped portions, and clamping the pair of mold blocks.

Abstract: A duct of an aircraft includes a hollow three-dimensional geometry shape that is formed of thermoplastic by suction-blow molding. The thermoplastic is filled or unfilled amorphous or semi-crystalline. More specifically, the thermoplastic includes reinforced polyetheretherketone (PEEK), reinforced polyphenylene sulfide (PPS), polyetherimide (PEI), or nylon. Also, a method of manufacturing an aircraft duct includes forming a hollow three-dimensional geometry shape of thermoplastic by suction-blow molding. The thermoplastic is filled or unfilled amorphous or semi-crystalline. More specifically, the thermoplastic includes reinforced PEEK, reinforced PPS, PEI, or nylon.

Abstract: A vacuum device includes a main body and an adjustment assembly connected to the main body. The main body includes a frame, a loading member, and an elastic film. The loading member and the elastic film are arranged at opposite end surfaces of the frame. A chamber is cooperatively formed by the frame, the loading member, and the elastic film. The adjustment assembly adjusts the inner air pressure of the chamber. The loading member includes an absorption area connecting the chamber to outside the main body. The absorption area changes the air pressure inside the chamber. Also provided is a bonding apparatus using the vacuum device.

Abstract: A vacuum lamination system and a vacuum lamination method are provided in which, when a laminate film and laminate base items are laminated and an excessive portion of the laminate film is cut from the laminated item having the laminate film laminated thereon, a high precision lamination is enabled and the cutting process including a conveying device for cutting the excessive portion of the laminate film can be simplified. In the vacuum lamination system, a laminate film and laminate base items that are conveyed on the carrier film are laminated by the batch type vacuum laminating device, and the laminate film is cut from the laminated item having the laminate film laminated thereon.

Abstract: A method for making a hollow box includes a step of cutting a plate into identification members; a step of sucking the plate to be attached on a fixed area of a female mold by a suction device; a step of squeezing melting and semi-solidified thermo-plastic material and sealing a lower end of the melting and semi-solidified thermo-plastic material, the melting and semi-solidified thermo-plastic material being expanded by the air introduced therein; a step of clamping the melting and semi-solidified thermo-plastic material by a female mold and a male mold; a step of expanding the melting and semi-solidified thermo-plastic material until the melting and semi-solidified thermo-plastic material contacts against insides of the female and male molds; a step of melting the surface of the identification member which is connected to the hollow box; a step of cooling obtaining the product by separating the female and male molds.

Abstract: A method for manufacturing a semi-finished blank for a varifocal liquid crystal lens includes coating the front of a first substrate and/or the rear of a second substrate with an adhesive agent, leaving an adhesive agent-free region that surrounds a liquid crystal holder; after said coating operation, reducing the pressure inside a sealed vessel that holds the first substrate and the second substrate, with respect to atmospheric pressure; affixing the second substrate over the front of the first substrate in the reduced pressure environment produced in said reducing the pressure operation; performing a standby operation including continuing the affixed state between the first substrate and the second substrate for a specific length of time in the reduced pressure environment produced in said reducing the pressure operation after the substrates have been affixed; and after said standby operation, restoring the pressure of the sealed vessel.

Abstract: The invention relates to a high molecular weight branched polyamide polymer comprising (a) blocks predominantly consisting of AA-BB repeat units, (b) blocks predominantly consisting of AB repeat units, and (c) branching units. The invention also relates to a process for the preparation of the high molecular weight branched polyamide polymer, comprising (1) a melt-mixing step wherein an essentially linear polyamide prepolymer (X-1), predominantly consisting of AA-BB repeat units, an essentially linear polyamide (pre)polymer (X-2), predominantly consisting of AB repeat units, and a branching agent are provided to and mixed and heated in a melt mixing apparatus, thereby forming a mixed melt, and the mixed melt being cooled, thereby forming a solid mixture; and (2) a solid state post condensation step wherein the solid mixture is post-condensed at elevated temperature in the solid state, thereby forming a high molecular weight branched polyamide polymer.

Abstract: Process and device for manufacturing a plastic fuel tank equipped with at least one communication component, by molding a parison using a mold comprising two impressions and a core, said process comprising the pressing of the parison against the impressions and formation of a pocket in this parison, the communication component being fastened in this pocket by welding of at least one portion of its side wall to at least one portion of the side wall of the pocket.

Abstract: Methods of producing toothbrush handles having an inner cavity are provided.

Abstract: A process for manufacturing a plastic fuel tank including at least one component, by molding a parison using a mold including two impressions and a core, the process including: introducing a parison into the mold impressions; introducing a core inside the parison, the core having a moving device including the at least one component closing the mold so that the impressions come into leaktight contact with the core; pressing the parison against the impressions by blowing through the core and/or applying a vacuum behind the impressions; fastening the at least one component on an inner wall of the parison; opening the mold to withdraw the core; and final molding the parison by blow-molding and/or thermoforming; and to enable its fastening to the parison, the component is moved away from the core by the moving device through a combination of a rotational motion and a linear motion.

Abstract: The main purpose of the invention is a device for manufacturing a composite part, comprising a mould, designed to be associated with a reinforcement of the composite part comprising a preform, into which the resin forming the matrix of the composite part will be injected, possibly a support element on which the mould is supported, a preform vacuum creation membrane supported on the mould and/or the support element, if there is one; characterised in that it also comprises a vacuum chamber covering the vacuum creation membrane, the vacuum chamber comprising a flexible wall designed to apply a mechanical pressure to the vacuum creation membrane.

Abstract: A method for manufacturing a laminated board, comprising: preparing a first and a second prepregs 30a, 30b with a carrier by laminating the carrier with an insulating resin layer in which a fiber cloth is embedded, and laminating the first and the second prepregs 30a, 30b with a carrier by bonding the insulating resin layer in the first prepreg 31a with a carrier and the insulating resin layer in the second prepreg 31b with a carrier directly or via an additional member under reduced pressure and heating it.

Abstract: A holding tool 2 for use in producing of laminated glass includes a frame 3, a bag member 4 and a supporting member 6b for suspending the bag member 4 from the frame 3. The bag member 4 is made of a film with flexibility and airtightness, is provided with a sealable opening and has evacuating ports 7a and 7b in the vicinity of an periphery of a flat shape thereof having the periphery sealed. The frame 3 has a first frame member 3w and a second frame member 3y opposing each other and disposed outside the periphery of the bag member 4, and the bag member 4 is suspended by the supporting member 6b movably against the frame 3 on a holding face formed at least by the first frame member 3w and the second frame member 3y inside an area formed by connecting ends of these frame members.

Abstract: A method and part forming apparatus configured for forming an aircraft stringer. The part forming apparatus may comprise a forming tool, a rigid plate, and a hollow bladder. The forming tool may comprise a material trough, a bladder extension trough laterally aligned with and open to the material trough, and a recessed pocket extending from either side of the bladder extension trough and adjacent to the material trough. The method comprises placing composite material into the material trough, placing the bladder onto the composite material and through the bladder extension trough, placing the rigid plate into the recessed pocket and over the bladder, and then placing skin laminate over the bladder and the composite material. Once each of these components is in place, the forming tool may be vacuum bagged and the composite material and skin laminate may be co-cured to form the stringer.

Abstract: A method for recycling energy and related blow molding machine—for blow molding plastic material containers including a recycling system for recycling the pneumatic energy of the discharge air coming from the blowing cavities of said machine, capable of recycling the discharge air making it available at a given pressure for a subsequent blowing in a cavity.

Abstract: A method of shaping plastics material pre-forms into plastics material containers with the steps: introducing a plastics material pre-form into a blow mould; conveying the blow mould with the plastics material pre-form along a pre-set conveying path; acting upon the plastics material pre-form with a gaseous medium during a pre-set period of time for the expansion thereof, wherein the supply of the gaseous medium is carried out in a controlled manner; and releasing the container from pressure at a pre-set point in time. According to the invention the pre-set point in time (t2) is variable.

Abstract: The invention relates to blowing equipment (1) that uses a pressurised fluid for blowing vessels from preforms of a thermoplastic material and including a body (3) and a neck (6), wherein said equipment comprises a blowing mould (5) with a moulding cavity (4) in which the body (3) of a preform (2) can be placed, said mould (5) including an upper surface (7) from which protrudes the neck (6) of a preform (2) once the body (3) of said preform (2) is placed in the cavity (4), and wherein said equipment (1) also includes a nozzle (8) with an end (9) shaped so as to be placed in functional sealed relation with the protruding neck (6) of the preform (2). The end (9) of the nozzle (8) is connected to a means (12) for degassing the blowing fluid, capable of bearing tightly on the upper surface (7) of the mould (5) so as to define an inner volume (13) in which the blowing fluid blown under pressure into the preform (2) can be discharged after the preform (2) blowing operation.

Abstract: Molding composed of metal-network-reinforced plastic in the form of a domelight, and production process for same.

Abstract: A method of manufacturing root of megawatt wind-turbine blade includes the following steps: (1) manufacturing an independent female mould, and arranging a positioning stop-ring on the female mould; (2) clinging on one side of the positioning stop-ring, a plurality of glass fabrics and macroporous glass fabrics are laid on the curved surface of the female mould; (3) after laying the glass fabrics, sealing the female mould using a vacuum bag, and vacuumizing the female mould after a curved supporting board is arranged on the vacuum bag; (4) after laying a plurality of glass fabrics in the blade mould, slinging the prefabricated part and the curved supporting board to arrange them in the blade mould; (5) sealing the blade mould using another vacuum bag, vacuumizing the blade mould, thereafter infusing resin into the blade mould, after curing the root of the blade is finally formed.

Abstract: The present invention aims to provide a manufacturing method for a PDP which allows even high-definition and ultra-high-definition PDPs to demonstrate an excellent image display capability at improved luminous efficiency, by suppressing variation of a discharge gas composition, and by eliminating an impurity gas in a discharge space effectively. To achieve the aim, deterioration of an absorbent material 39 composed of copper ion-exchanged ZSM-5-type zeolite is prevented, by performing both sealing and evacuation steps for the front substrate 2 and back substrate 9 in a non-oxidizing gas atmosphere. This maintains properties of the absorbent material 39 for absorbing the impurity gas without degradation, even if the absorbent material 39 absorbs a Xe gas in a discharge gas introducing step.

Abstract: A holding tool 2 for use in producing of laminated glass includes a frame 3, a bag member 4 and a supporting member 6b for suspending the bag member 4 from the frame 3. The bag member 4 is made of a film with flexibility and airtightness, is provided with a sealable opening and has evacuating ports 7a and 7b in the vicinity of an periphery of a flat shape thereof having the periphery sealed. The frame 3 has a first frame member 3w and a second frame member 3y opposing each other and disposed outside the periphery of the bag member 4, and the bag member 4 is suspended by the supporting member 6b movably against the frame 3 on a holding face formed at least by the first frame member 3w and the second frame member 3y inside an area formed by connecting ends of these frame members.

Abstract: An apparatus and method for forming a plastic container is provided. The method includes disposing a preform into a primary mold cavity and applying pressurized air to urge the preform to conform to the shape of the primary mold cavity to form a primary article. The primary article is then permitted to shrink to a predetermined volume. The method can further include exposing the primary article to an internal vacuum to facilitate shrinking to a predetermined volume. The method further includes disposing the primary article into a second mold cavity and applying pressurized air to urge the primary article to conform to the second mold cavity to form an intermediate article. Finally, at least a portion of the intermediate article is trimmed off to form a final container.

Abstract: Disclosed is a thermoforming mold that defines a surface of a thermoformed part, a cavity recess that defines part of the interior space of the thermoformed part, a bond flange ridge, a vent recess and a chamber recess in an offal region outside of the surface of the thermoformed part, where the chamber recess, the vent recess and the cavity recess collectively define a continuous recess and where the part does not extend substantially beyond the bond flange ridge. Also disclosed is a manufacturing method including molding a first and second plastic sheet to thermoforming molds, impressing the first and second plastic sheets together between the thermoforming molds to define the part, a seam, a vent and a chamber then inserting a blow needle into the chamber and using that blow needle to move a fluid through the interior space of the part through the vent and then removing the offal and the chamber from the part. Also disclosed is a thermoformed part manufactured using the mold and method described above.

Abstract: In a method and apparatus for producing a composite component, a tubular hollow section blank is placed into a die cavity of a combination tool comprising an inner high-pressure shaping tool and an injection-molding tool. The combination tool is filled with a fluid in such a way that the blank is wetted from the inside by the fluid, and the ends of the combination tool are sealed by two axial molding plugs. The filled blank is then expanded under pressure . The finished hollow section is plastic-coated in the same tool. The hollow section is emptied after shaping in the sealed state, at least until it is no longer dripping, the pressurized fluid being expelled under pressure from the hollow section through at least one discharge channel formed in the axial molding plugs.

Abstract: A method for fabricating an air-filled cellular structure for use as a resilient cushion. The method includes providing a molding structure including a shelf substantially surrounding a depression, and a platform that fits within the depression and is selectively movable between a plurality of positions relative to the shelf, moving the platform to a preselected position relative to the shelf, wherein the preselected position corresponds to a substantially predetermined amount of air to be contained by the air-filled cellular structure, and using a vacuum device to draw air from within the depression.

Abstract: A method for making a honeycomb composite structure wherein the method allows for fluid flow from cells of a honeycomb core during a cure process. More specifically, the method involves forming one or more vents in a skin of the structure, which are preferably filled with venting wicks, to allow for fluid flow before being sealed by the polymer matrix during a skin bonding process. Additionally, the structure preferably comprises a scrim that allows for fluid flow between multiple cells of the honeycomb core. The honeycomb composite structure produced according to this process comprises, among other things, a sealed venting region that comprises a polymer matrix and fibers that are transverse to the skin.

Abstract: Process and device for manufacturing a plastic fuel tank equipped with at least one communication component, by molding a parison using a mold comprising two impressions and a core, said process comprising the pressing of the parison against the impressions and formation of a pocket in this parison, the communication component being fastened in this pocket by welding of at least one portion of its side wall to at least one portion of the side wall of the pocket.

Abstract: A method for producing a container associable with airless pumps, in the interior of which container a deformable bag is formed by blow moulding a preform of plastic material. A vacuum is created in the container interior during or slightly before blowing.

Abstract: Process for manufacturing a plastic fuel tank equipped with a component, by molding a parison using a mold comprising two cavities and a core, the process comprising the mounting of a component around a needle or an oblong object attached to the core, the displacement of the needle or oblong object so as to deform the parison and pierce an opening into it, the needle or oblong object carrying the component with it in order to position the component in the opening, and the withdrawal of the needle/oblong object, leaving the component lodged in the opening.

Abstract: Heat is extracted from compressed gas used in a blow-molding process by expansion cooling the exhausted gas and/or passing the exhausted gas through a vortex tube, which supplies cold gas at an exit thereof. The cold gas is then routed through cooling channels in the mold. This obviates the need for recirculating or externally chilling a coolant and saves energy.

Abstract: The present invention discloses a cooling fetch apparatus of performs, and the apparatus includes: a first fetch mechanism, moved back and forth, for fetching each perform formed in a mold of an injection molding machine from the mold; a second fetch mechanism, moved back and forth, for fetching each preform on the first fetch mechanism. After the second fetch mechanism fetches a predetermined quantity of performs, the performs on second fetch mechanism are unloaded sequentially, such that the injection molding process and the cooling process of the performs are separated. The timing of fetching each perform on the second fetch mechanism is controlled for assuring a good cooling effect of each preform.

Abstract: Process for manufacturing a container (2) from a plastic preform (3) by blow-molding in a mold (11), comprising: an operation of introducing the preform (3) into the mold (11); a blow-molding operation consisting of pressurizing the preform (3) by introducing a gas under a blow-molding pressure into it; a flushing operation subsequent to the blow-molding operation consisting of partially pressurizing the container (2) by introducing a gas under a flushing pressure lower than the blow-molding pressure into it; an operation of at least partial depressurization of the container down to a pressure lower than the flushing pressure, wherein this depressurization operation is subsequent to the blow-molding operation and prior to the flushing operation.

Abstract: A device for molding a container from a thermoplastic material in which a heated parison is pre-blown by supplying low-pressure blowing air from a low-pressure air supply and then the blow molding is completed by subsequent supply of high-pressure blowing air and in which the high-pressure blowing air flowing out of the container that has been completely blow molded is supplied to the low-pressure air supply via a reversing mechanism during a transitional phase. A pressure monitoring is performed in the area of the low-pressure air supply and in which, after the transitional phase, the container is vented with respect to an ambient pressure whereby the pressure in the low-pressure air supply is controlled by varying the duration of the transitional phase.

Abstract: Embodiments of the present invention teach a method for post-mold treatment of a molded article and an apparatus for implementing the method. For example, a method of post-mold treatment of a molded article is provided. The method can be implemented in a molded article receptacle. The method comprises at a first instance in time, subjecting the molded article to a first type of post-mold treatment; and at a second instance in time, subjecting the molded article to a second type of post-mold treatment.

Abstract: A blow molding method for manufacturing a container equipped with a receptacle divided by a partition wall, wherein the partition wall is formed in a preform, which is in general fabricated by injection molding, the preform is arranged in a blow molding die, and blow molding is performed to the preform in a molding process which is conducted two times, so that a container product has constant partition walls overall. The blow molding method includes forming a preform having a receptacle divided by the partition wall, arranging the preform in a blowing mold and initially blow molding the same via a first blowing so as to impart a certain shape, and secondarily blow molding the resultant via a second blowing so as to impart a shape corresponding to that of the blowing mold.