JP2005343507A - Secondary lid molding apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a secondary lid molding apparatus which is applicable to a filling and packaging machine capable of obtaining a sealed container sealed by covering a lid molded of a sheet-like lid material made of a synthetic resin on a container made of a synthetic resin filled with a content such as a soft drink. <P>SOLUTION: A drawing means has an inserting hole or an inserting recessed part into which a lid skirt placed on a sealed container can be inserted in order to mold a lid for the sealed container sealed on the upper end opening of a closed-end cylindrical container body made of the synthetic resin filled with the content into a final lid shape, wherein the molded lid made of the synthetic resin has a disk-like lid body molded by a primary lid cold molding apparatus and a skirt provided into a hanging shape on the peripheral edge of the lid body. A twisting means twists the lid skirt and/or the sealed container body in a state that the lid skirt is drawn. The secondary lid molding apparatus has the drawing means and the twisting means. It is preferable that the lid skirt is heated before drawing and twisting processes for the lid skirt are conducted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lid forming device in a filling and packaging machine in which a container is filled with contents such as a soft drink and covered with a lid, and more specifically, a disc-shaped lid body and a lid body periphery formed by a primary lid molding device The lid of the sealed container sealed with a synthetic resin bottomed cylindrical container body filled with the contents of a synthetic resin molded lid having a skirt portion provided in a hanging shape in the final lid shape The present invention relates to a secondary lid molding apparatus that molds into a secondary.

  Conventionally, as a filling and packaging machine of this type, a container standing apparatus for standing a bottle-shaped synthetic resin container supplied in an arbitrary direction so that its upper end opening faces upward and supplying it to a subsequent process; A filling device for filling the container supplied with the contents from the container standing device, a lid supply device for covering the upper end opening of the container filled with the contents with a substantially U-shaped lid, and the lid for the container 2. Description of the Related Art A filling and packaging machine including a sealing device that heat-seals an upper end opening is known (see, for example, Patent Document 1).

  Since the bottle-shaped synthetic resin container may have a mouth directly on the container opening and drink the contents after removing the lid, this part is protected to keep the area around the container opening hygienic. And a lid (a substantially U-shaped lid in cross section) comprising a disc-shaped lid body covering the upper end opening of the container and a skirt portion suspended from the peripheral edge of the lid body. ing.

  As a filling and packaging machine that manufactures content-filled containers covered with a U-shaped lid, the heat seal layer is laminated on the aluminum foil, focusing on the excellent formability and shape retention of the aluminum foil. Using the formed sheet-shaped lid material, a disk-shaped lid is punched from the lid material, and a lid punching and molding device that forms a U-shaped cross-section lid immediately after punching, and a molded U-shaped lid shape is being conveyed What is provided with the lid | cover supply apparatus which supplies a supply crown to the opening part of this container is known (for example, refer patent document 2). However, in a container having a cover made of an aluminum stay layer as a base material, a metal detector cannot be used, so nails, staples, broken pieces of molded product cutting blades, bolts, nuts, wires, springs There is a problem that it is impossible to detect metals that may be mixed. In addition, these containers having an aluminum lid have the disadvantage that the aluminum lid and the container body made of synthetic resin such as polystyrene need to be separately collected and are inferior in recyclability.

  On the other hand, in order to solve such problems, the present inventors have proposed a lid made of a laminated film only of a synthetic resin layer having no aluminum night layer as an alternative to the lid material having an aluminum night layer. (For example, see Patent Document 3). However, the lid is a lid made of only a combination of synthetic resin layers, and the lid shape is also highly complete. However, in order to mold the lid, the lid material must be heated and molded. The lid molding apparatus is expensive and large-scale, and it is difficult to make the lid molding apparatus and the filling and packaging machine a continuous process from the temperature control surface of the heating zone for heating the lid. there were.

  In order to solve the above problems, the present inventors have repeated research on the lid material and succeeded in developing a synthetic resin lid material that can be molded by cold drawing (for example, see Patent Document 4). ), A container using a synthetic resin lid capable of forming a lid by cold drawing, that is, a sealed container including a resin container and a lid fixed to the resin container, A sealed container having shape retention obtained by cold-molding a polystyrene resin sheet having a propagation energy of 0.015 J or more in a 150 μm-thick sheet measured by a falling weight impact test method in accordance with ASTM-D3763 ( For example, see Patent Document 5), or a sealed container including a resin container and a lid fixed to the resin container, and the lid is made of high impact polystyrene (HIPS) or impact resistant polystyrene. A resin sheet for cold molding having a base material layer containing a polystyrene resin containing a composition composed of water-soluble polystyrene and a styrene-butadiene copolymer, and has shape retention. The characteristic sealed container (for example, refer patent document 6) is proposed.

Japanese Patent Publication No.49-37977 JP 63-2112019 A JP 2002-225902 A JP 2004-74794 A JP 2004-75197 A JP 2004-75196 A

  An object of the present invention is to solve all the above-mentioned conventional problems, and seal a synthetic resin container filled with contents such as a soft drink covered with a synthetic resin sheet-like lid material. Another object of the present invention is to provide a secondary lid forming apparatus applicable to a filling and packaging machine that can obtain a sealed container.

  In order to solve the above problems, the present inventors filled a synthetic resin container body with the contents, covered the container body filled with the contents with a non-aluminum synthetic resin lid, and sealed the container body and the lid. In order to develop a secondary lid forming device that can be applied to a filling and packaging machine that forms a sealed container, for example, a container supply device that supplies a synthetic resin bottomed cylindrical container body to the filling device is supplied. A primary lid for molding a synthetic resin molding lid having a filling device for filling the container body with the contents, and a sheet-like lid material and a disc-like lid body and a skirt portion provided in a suspended manner on the periphery of the lid body. A cold forming device, a lid supply device for supplying a molding lid to the upper end opening of the container body filled with the contents, a sealing device for sealing the molding lid to the upper end opening of the container body to form a sealed container, The lid of the sealed container molded by the primary lid molding device, When the secondary lid molding device that can be applied to the filling and packaging machine including the secondary lid molding device that molds into the end lid shape has a squeezing means or a squeezing / twisting means of the lid skirt portion of the sealed container, A lid formed by a primary cold lid molding device can be completely molded by a secondary molding device, and a lid material based on a conventional aluminum stay layer can be formed using a synthetic resin lid material. It has been found that a product container equivalent to the product container used can be obtained, and the present invention has been completed.

  That is, the present invention provides a synthetic resin molding lid having a disc-shaped lid body molded by a primary lid molding apparatus and a skirt portion provided in a suspended manner at the peripheral edge portion of the lid body. A secondary lid molding device for molding a lid of a sealed container sealed in an upper end opening of a bottomed cylindrical container body into a final lid shape, having a squeezing means or a squeezing / twisting means for a lid skirt portion of the sealed container The lid forming apparatus (Claim 1) characterized by the above and the drawing / twisting means of the lid skirt portion of the sealed container have a fitting hole or a fitting recess into which the lid skirt portion of the sealed container placed can be fitted. 2. The secondary lid forming apparatus (Claim 2) according to claim 1, further comprising: squeezing means; and means for twisting the lid skirt portion and / or the sealed container body with the lid skirt portion being squeezed. The lid of the sealed container placed The squeezing means having an insertion hole or an insertion recess into which the seat portion can be inserted is a container base on which the sealed container is placed, and an insertion hole or an insertion recess in which the lid skirt portion of the sealed container placed on the container base can be inserted And the container base and / or the female molding member are moved close to and away from each other so that the lid skirt portion of the sealed container can be inserted into and withdrawn from the insertion hole or the insertion recess of the female molding member. It has a raising / lowering mechanism, It is related with the secondary cover molding apparatus (Claim 3) of Claim 2.

  Further, the present invention provides an extrusion piston in which the female molding member is provided so as to be reciprocally movable in a cylindrical hollow portion thereof, and has a fitting hole or a fitting concave portion into which a lid skirt portion of a sealed container can be fitted. And a means for urging the extrusion piston toward the opening end of the molding hole, and a secondary lid molding device (Claim 4) according to claim 3, and a state in which the lid skirt portion is squeezed The means for twisting the lid skirt portion and / or the sealed container body is means for rotating a gear fixed to a piston rod of an extrusion piston by a toothed belt spanned across a plurality of pulleys. The secondary lid forming apparatus according to any one of claims 2 to 4 (Claim 5) and the sealing provided before the drawing step or drawing / twisting step of the lid skirt portion of the sealed container by the drawing unit or drawing / twisting unit Container lid skirt About the secondary cap forming device according to any one of claims 1 to 5, characterized in that it comprises a heating means for heating the (claim 6).

  Further, according to the present invention, the heating means includes a hot air nozzle for injecting hot air toward the lid skirt portion of the sealed container, and a rotating means for rotating and transporting the sealed container with the longitudinal axis of the sealed container as a rotation axis. The secondary lid forming apparatus according to claim 6, wherein a hot air cover is provided above the conveying path for rotating and transporting the sealed container. The apparatus (Claim 8) or the primary lid molding apparatus is a primary lid cold molding apparatus, and relates to the secondary lid molding apparatus (Claim 9) according to any one of claims 1 to 8.

  When the secondary lid molding apparatus of the present invention is used, a synthetic resin container filled with contents is covered with a lid molded from a synthetic resin sheet-like lid material, and a conventional aluminum stay layer is used as a base material. A product container equivalent to the product container using the lid material can be obtained.

  As the secondary lid molding device of the present invention, a synthetic resin molding lid having a disc-like lid body molded by the primary lid molding device and a skirt portion provided in a suspended manner on the peripheral edge portion of the lid body is used. A secondary lid molding device for molding a lid of a sealed container sealed in an upper end opening of a filled synthetic resin bottomed cylindrical container body into a final lid shape, and means for squeezing or squeezing a lid skirt portion of the sealed container / As long as the device has twisting means, there is no particular limitation. Usually, the container body is filled with the contents, the container body filled with the contents is covered with a lid, and the container body and the lid are sealed and sealed. Applicable to filling and packaging machines used as containers. Such a filling and packaging machine includes a container supply device that supplies a synthetic resin-bottomed cylindrical container body to a filling device, a filling device that fills the supplied container body with contents, and a sheet-like lid material. A primary lid molding device for molding a synthetic resin molding lid having a lid body and a skirt portion provided in a hanging shape on the periphery of the lid body, and a molding lid is supplied to the upper end opening of the container body filled with the contents A lid supply device, a sealing device that seals the molding lid to the upper end opening of the container body to form a sealed container, and a secondary lid molding that molds the lid of the sealed container molded by the primary lid molding device into a final lid shape What provided the apparatus can be illustrated suitably. For example, a plurality of containers are held in a direction orthogonal to the transport direction, and the container is sequentially or continuously transported linearly downstream in the transport direction, and sequentially along the container transport path, the filling device and the primary lid Although it may be a filling and packaging machine comprising a molding device, a lid supply device, a sealing device, and a secondary lid molding device, and configured to perform each treatment simultaneously on a plurality of containers held in a direction orthogonal to the conveying direction, With a continuous rotary filling and packaging machine that completes a sealed container filled with contents through each processing device such as a rotary filling device and a sealing device while continuously conveying the container in one row, It is possible to make the filling and packaging machine compact and high-capacity.

  The container supply device is not particularly limited as long as it is a device that can supply a synthetic resin bottomed cylindrical container body to a filling device. For example, a conventionally known device including a container settling device, a transfer conveyor, a screw conveyor, and the like. Can be used. When such a container supply device is used, bottle-shaped synthetic resin containers supplied in an arbitrary direction are set up by the container setting device so that the upper end opening portion faces upward, and are placed in a row on the conveyor. The containers placed on the transport conveyor are transported downstream, and are aligned at a predetermined pitch by the screw conveyor at the downstream portion of the transport conveyor, and the aligned containers are sent to the filling device via the inlet star wheel. Will be supplied.

  The filling device is not particularly limited as long as it can fill the contents of the container body supplied by the container supply device. For example, the filling device and the bottom surface of the peripheral portion of the filling solution tank face downward at equal intervals. It is possible to use a conventionally known one having a predetermined number of filling nozzles, a container mounting table provided at a filling nozzle corresponding position below the filling nozzle, and a turntable to which the container mounting table is attached. it can. When such a filling device is used, while the container on the container mounting table is rotating, the container mounting table or the filling nozzle can be moved up and down to fill the contents.

  The primary lid molding device is not particularly limited as long as it is a device capable of molding a synthetic resin molding lid having a disk-shaped lid body and a skirt portion provided in a suspended manner on the periphery of the lid body from a sheet-like lid material. However, a primary lid cold forming device is preferable, and a device provided with a lid material roll, a lid material automatic joining device, a half cut forming device, a lid punching molding device, a recovery roll, and the like can be suitably exemplified. When such a primary lid cold forming apparatus is used, a synthetic resin sheet-shaped lid material wound in a roll shape is first guided to a half-cut forming apparatus via a lid material automatic joining device. The half-cut forming device for ensuring the openability when the straw is pierced into the lid of the container is not particularly limited as long as it can form a substantially U-shaped groove in the sheet-like lid material. A publicly known cutter provided with a blade for forming a groove on the outer peripheral surface of the roller made can be exemplified. The sheet-like lid material in which the groove is formed by the half-cut forming device is then guided to the lid punching molding device.

  As the above-described lid punching and forming apparatus, a conventionally known device can be used, but a lid material punching means for punching one or more lid materials from a sheet-like lid material, and a lid material punched by the lid material punching means A forming die for forming the lid and a lid forming means having a former, and a plurality of grooves or protrusions on the inner peripheral surface of the forming die and / or a plurality of grooves or protrusions on the outer peripheral surface of the former. In particular, in the case where a plurality of grooves are provided on the inner peripheral surface of the forming die, since a portion for guiding wrinkles such as a groove is provided, stress concentrates on the bent portion and plastic deformation occurs. It is preferable in terms of the property of maintaining a bent and deformed shape, so-called shape retention. In particular, if the grooves or protrusions provided on the inner peripheral surface of the forming die and / or the grooves or protrusions provided on the outer peripheral surface of the former are provided in parallel with the insertion direction of the former, the former slides. In addition, a groove or protrusion provided on the inner peripheral surface of the molding die having a circular cross-sectional shape smoothly induces the formation of wrinkles and improves the shape retention of the lid. Preferably, the surface of the inner surface of the molding die is subjected to surface treatment, or the surface of the inner surface of the molding die and the surface of the mouth are subjected to surface treatment. This improves the slidability and makes it easier for stress to concentrate on the bent part, causing plastic deformation, improving shape retention, and preventing damage to the lid that occurs during stamping. The mold lid can be removed from the molding die (releasability) Preferable in that it also be improved. Examples of the surface treatment include hard chrome plating, nickel boron plating, and Kanigen plating. Nickel boron is used in that the surface treatment that reduces the dynamic friction coefficient further improves the slidability of the skirt portion of the lid. Plating is preferred.

  It is preferable that the gap (narrowest gap) between the forming die and the former in the lid forming means is adjusted to 4.0 times or less with respect to the thickness of the sheet-like lid material, and in particular, 1.3 times to It is preferable to adjust so that it may be 3.5 times or less. When the gap between the molding die and the former is 4.0 times or less, the packaging sheet is plastically deformed, and it becomes even easier to produce a resin lid having shape retention. When the thickness of the packaging material is 1.3 times or more, particularly 1.5 times or more, the possibility that the packaging material sheet is damaged during the punching process is further reduced.

  Further, the lid material punching means is not particularly limited as long as it can punch one or more lid materials from the sheet-like lid material, but the movable blade and the molding die provided at positions facing the molding die are not limited. Punching means comprising a fixed blade provided adjacent to the outer peripheral edge at a surface height can be suitably exemplified. In addition, if the presser member for the sheet-like lid is attached to the flange via a spring so as to surround the outer peripheral edge of the movable blade, the sheet-like lid can be prevented from moving during punching, and the punching process can be stabilized. Can be done.

  The lid forming means can be advantageously used as a part of the primary lid cold forming apparatus. The lid supply device is not particularly limited as long as it is a device that can supply the molding lid molded by the primary lid cold molding device to the upper end opening of the container body filled with the contents, and by the lid molding means. The lids formed in a substantially U-shaped cross section are dropped onto a lower lid feeding device (chute), and the lids are placed one by one on the upper end opening of the container conveyed by an intermediate star wheel or the like. The sheet-like lid material from which the lid is punched is collected by a collection roll.

  As described above, when a lid punching and forming apparatus is used, for example, one or more lid materials are punched from a cold forming resin sheet, and immediately after the lid material is punched, the packaging material is applied to the mouth portion of the molding die. The former is advanced in contact with the molding die and inserted into the molding die, and a skirt portion of the lid is formed in the gap between the former and the molding die, and the punched lid material can be molded into a lid shape. By a plurality of grooves or protrusions provided on the inner peripheral surface of the die and / or a plurality of grooves or protrusions provided on the outer peripheral surface of the former, preferably by a plurality of grooves provided on the inner peripheral surface of the forming die It can be formed into a lid shape while guiding wrinkles to the skirt portion of the lid. Hereinafter, the cold-molding resin sheet mentioned as a suitable example of a sheet-like cover material is explained in full detail.

  The cold-molding resin sheet is used for the production of a synthetic resin lid that is fixed to a resin-molded product (such as a container body), and a base material layer (single layer) or a base material layer (laminated body) in which functional layers are laminated The resin sheet is not particularly limited as long as it is a resin sheet for cold forming that can impart shape retention to the resin lid. In addition, a laminated structure in which functional layers are laminated on both surfaces or one surface of the base material layer may be used, and as the functional layer, a sealant layer having an adhesive function, an antistatic layer having an antistatic function, Examples thereof include a barrier layer having a gas permeation blocking function, a printing layer having a display function, and a protective layer having a printing layer protection function.

  The base layer of the cold-molding resin sheet is a layer having cold formability that makes it possible to form a secondary processed product having shape retention by plastic deformation by cold forming of the sheet. The material of the material layer is not particularly limited. For example, PS (polystyrene) resin, AS (styrene-acrylonitrile copolymer) resin, ABS (acrylonitrile-butadiene-styrene copolymer) resin, AXS ( (Terpolymer having acrylonitrile and styrene component) PS resin such as resin, PET resin such as unsaturated polyester resin and saturated polyester resin, high density polyethylene, low density polyethylene, EVA (ethylene-vinyl acetate copolymer) Polyethylene resin such as resin, EVOH (ethylene-vinyl alcohol copolymer) resin, and polypropylene Emissions-based resin, and other polyolefin resins, and polyacetal resin, can be exemplified those containing polycarbonate resin, it may be one containing one or more of these. Among these, those containing PS resin, ABS resin, and PET resin are preferable, but it is particularly preferable to contain the same type of resin as the main component of the resin molded product because recyclability can be improved. When the resin molded product contains a polystyrene resin, particularly an impact-resistant polystyrene resin as a main component, it is more preferable to contain the same type of polystyrene resin or impact-resistant polystyrene resin as a main component. In addition, for these resins, additives such as plasticizers, stabilizers, flame retardants, antioxidants, ultraviolet absorbers, colorants, antistatic agents, and auxiliary materials additives such as reinforcing agents and fillers are appropriately used. May be added.

  Examples of the polystyrene resin contained in the base layer of the cold-molding resin sheet include so-called general-purpose polystyrene resins, rubber-modified polystyrene resins, and mixtures thereof. Among these, A rubber-modified polystyrene resin is preferable, and among the rubber-modified polystyrene resins, an impact-resistant polystyrene resin is preferable, and in particular, a mixture obtained by mixing and kneading a styrene-butadiene copolymer at a predetermined ratio to an impact-resistant polystyrene resin. preferable.

  The general polystyrene-based resin is also called GPPS, and is usually a styrene homopolymer, but the resin used for the base material layer is not limited to the styrene homopolymer. Examples of the styrene monomer of the general polystyrene resin include styrene having one or more substituents such as an alkyl group and a phenyl group in addition to styrene. Specific examples of the styrene monomer include α-methylstyrene, α-ethylstyrene, α-n-propylstyrene, α-isopropylstyrene, α-n-butylstyrene, α-t-butylstyrene, and o-methylstyrene. , M-methyl styrene, p-methyl styrene, o-ethyl styrene, m-ethyl styrene, p-ethyl styrene, o-isopropyl styrene, m-isopropyl styrene, p-isopropyl styrene, ot-butyl styrene, m- Examples thereof include alkyl-substituted styrenes such as t-butyl styrene and p-t-butyl styrene, and the polystyrene resin may be a homopolymer of these monomers or a copolymer of two or more. As copolymers, random copolymers, alternating copolymers, block copolymers, grafts The polymer or the like may be any one.

  The rubber-modified polystyrene resin may be any so-called impact-resistant polystyrene (HIPS) in which synthetic rubber is blended with polystyrene, and the blending method is rubber and polystyrene, that is, a polymer. Either a method of mechanically blending them together or a method of mixing them both in a latex form or a method of polymerizing by dissolving rubber in a styrene monomer may be used, but a styrenic polymer in the presence of a rubbery polymer. A method of polymerizing monomers is preferred. The high impact polystyrene obtained by the method of polymerizing a styrene monomer in the presence of such a rubbery polymer is a graft copolymer having a polystyrene side chain on a rubber, and the high impact polystyrene is a matrix. The soft component particles have a structure in which the soft component particles are dispersed in the polystyrene that forms the polymer, and the soft component particles have a structure in which polystyrene is occluded in a rubbery polymer generally called a salami structure or a single occlusion structure. However, it is not limited to these. Examples of the styrene monomer include styrene monomers similar to the above-described GPPS, and examples of the rubbery polymer include polybutadiene, styrene-butadiene copolymer, polyisoprene, Among these, a styrene-butadiene copolymer is particularly preferable. Examples of such styrene-butadiene copolymers include SBR-based thermoplastic rubbers, and styrene-butadiene block copolymers having a SB or SBS structure, or SEBS in which these are completely or partially hydrogenated are also used. be able to.

  As the rubber-modified polystyrene resin contained in the base material layer, impact-resistant polystyrene alone or a composition comprising impact-resistant polystyrene and a styrene-butadiene copolymer, particularly, impact-resistant polystyrene of 100 to 70% by weight. And a styrene-butadiene copolymer in an amount of 0 to 30% by weight, in particular, obtained by polymerizing a styrene monomer in the presence of a rubbery polymer, and the weight average molecular weight of the matrix is 150,000 to 300,000. An impact polystyrene having a styrene content of 82 to 94% by weight, a rubber content of 6 to 15% by weight and a liquid paraffin content of 0 to 3.0% by weight (hereinafter referred to as “impact polystyrene (A)”). Styrene-butadiene copolymer having a styrene content of 30 to 90% by weight and a butadiene content of 70 to 10% by weight (hereinafter referred to as 100 to 70% by weight) A composition comprising a composition consisting of 0 to 30% by weight (referred to as “styrene-butadiene copolymer (B)”) enables plastic deformation by cold forming of the sheet, and is obtained by cold forming of the sheet. The next molded product (synthetic resin molding lid) is particularly preferable because it has both excellent impact resistance and shape retention.

  If the rubber content of the high impact polystyrene (A) is 6% by weight or more, preferably 9% by weight or more, the sheet does not break during cold forming, and if the rubber content is 15% by weight or less, Cold forming is preferable because the sheet is more easily plastically deformed, and the resulting secondary formed product has sufficient shape retention. The amount of rubber of impact-resistant polystyrene is calibrated by the infrared absorption spectrum (IR) method using a method of calculating from the amount of rubber used at the time of production or using impact-resistant polystyrene containing a known amount of rubber as a standard sample. It can be determined by creating and evaluating a line.

  Further, when the content of liquid paraffin in the above impact-resistant polystyrene (A) is 3.0% by weight or less, preferably 2.0% by weight or less, the sheet is more easily plastically deformed by cold forming, and thus obtained. A synthetic resin molded lid is preferable because it has sufficient shape retention. Specific examples of such liquid paraffins include cycloparaffins such as cyclopentane, cyclohexane, and cycloheptane. White mineral oil (a mixture of alkyl naphthene hydrocarbons having an average weight molecular weight of 300) that can be used for food packaging materials. (Mineral oil of about ~ 600) can be preferably exemplified.

  Among the above impact-resistant polystyrenes (A), those having a weight average molecular weight in the range of 150,000 to 300,000, particularly 200,000 to 250,000 are preferable, and if the weight average molecular weight of the matrix is 150,000 or more, Synthetic resin molding lid obtained by cold forming becomes a resin lid with more appropriate strength, and if it is 300,000 or less, the sheet is more easily plastically deformed by cold molding, and the resulting synthetic resin molding It is preferable because the lid has sufficient shape retention. The molecular weight of the impact-resistant polystyrene (A) matrix can be measured by the following method. That is, 1 g of impact-resistant polystyrene is dissolved in 30 ml of a methyl ethyl ketone / methanol mixed solvent (20/3 volume ratio). Next, the matrix portion and the soft component particles that are insoluble components are separated by centrifugation, and the supernatant liquid other than the insoluble components is taken out by decantation, and it is gradually added to about 500 ml of methanol with stirring to precipitate the polymer portion. . The polymer part was separated by filtration, methanol was removed by drying, and a solution obtained by dissolving the obtained dry sample in tetrahydrofuran so as to have a concentration of 2 mg / ml was used by gel permeation chromatography (GPC). Measure the molecular weight of the matrix. The GPC used is equipped with a differential refractometer (RI detector) as a detector, and the molecular weight can be calculated by a calibration curve obtained using commercially available monodisperse polystyrene.

  Moreover, among the said impact-resistant polystyrene (A), the thing whose swelling degree of the soft component particle contained is 30 or less is preferable. If the degree of swelling of the soft component particles is 30 or less, the sheet is more easily plastically deformed by cold forming, and the resulting synthetic resin molding lid has sufficient shape retention. The degree of swelling can be measured by the following method. That is, 0.4 g of impact-resistant polystyrene is dissolved in 18 ml of toluene and left for 2 hours or longer. The obtained toluene solution is subjected to a centrifuge (4500 rpm × 2 hours) to separate insoluble components. The supernatant is discarded, the insoluble matter is weighed, and the weight is a. Next, the insoluble matter is dried with a vacuum dryer, and the weight after drying is defined as b. The degree of swelling can be determined by a / b.

  Further, among the above impact-resistant polystyrene (A), those having an average particle diameter of 0.5 to 10 μm, particularly 1 to 5 μm are preferable. If it is 0.5 μm or more, preferably 1 μm or more, the sheet will not break during cold forming of the sheet, and if it is 10 μm or less, preferably 5 μm or less, the sheet is more easily plastically deformed by cold forming. Thus, the obtained synthetic resin molding lid has sufficient shape retention. The average particle diameter of the soft component particles can be measured by the following method. That is, high-impact polystyrene is dissolved in methyl ethyl ketone so as to have a concentration of about 1%. This sample solution is irradiated with laser light using a laser diffraction particle size distribution measuring device (SALD1100, manufactured by Shimadzu Corporation), and images of the generated diffracted light and scattered light are detected, and the size of the particles is determined by the pattern and intensity of the image. Calculate thickness and quantity. The average particle size can be 50% in the cumulative volume distribution.

  On the other hand, among the styrene-butadiene copolymers (B), those having a styrene content of 30 to 90% by weight and a butadiene content of 10 to 70% by weight have better shape retention and impact resistance. It is preferable in that it can be added.

  For the base material layer in the resin sheet used, various additives such as antioxidants, plasticizers, heat stabilizers, ultraviolet absorbers, light stabilizers, lubricants, mold release agents, flame retardants, flame retardants, etc. Additives such as a fuel aid, pigment, dye, carbon black, and antistatic agent can be added, and organic fine particles and inorganic fine particles can be added as long as the performance of the base material layer is not impaired. Further, the thickness of the base material layer in the resin sheet is not particularly limited, but, for example, a polystyrene system for producing a synthetic resin molding lid that requires peeling between a resin molded product such as an open container In the case of a resin sheet, a range of 50 μm to 1 mm is preferable.

  The functional layer laminated on one or both sides of the base material layer in the resin sheet used has various functions to improve adhesion, antistatic properties, abrasion resistance, aesthetics, weather resistance, gas barrier resistance, etc. For example, a sealant layer, an antistatic layer, a printing layer, a barrier layer, and the like can be given. The functional layer may be composed of a multilayer having each function, or may be composed of a single layer having a plurality of functions. As a resin sheet having these functional layers, For example, a base material layer with a sealant layer laminated on both sides or one side, a base material layer with a sealant layer and an antistatic layer laminated on each side, and a base material layer on one side with a sealant layer Can be exemplified, in which a printed layer and an antistatic layer are sequentially provided on the other surface, and a barrier layer is laminated between a sealant layer and a base material layer. These functional layers may contain additives such as antioxidants, heat stabilizers, UV absorbers, light stabilizers, flame retardants, mineral oils, and external additives as needed. Organic fine particles and inorganic fine particles can be added as long as the performance is not impaired.

  As a method for producing the functional layer such as the sealant layer or the antistatic layer, a coating liquid containing a component corresponding to each function, for example, an adhesive component or an antistatic agent, is applied to one or both sides of the base material layer and dried. And a method of kneading these components with a resin raw material to produce a film and laminating it. As a coating method, a roll coater, a knife coater, a gravure knife coater, a spraying method or the like can be adopted. Even if the surface of the base material layer is modified in advance by a corona discharge treatment method, an ozone treatment method, a plasma treatment method, or the like. Good. In the case of a functional film for laminating, a film containing the same type of resin as the base material layer is preferable. For example, when the base material layer contains the above-mentioned polystyrene resin, GPPS and / or styrene-butadiene copolymer is used. What is contained is preferable.

  The sealant layer as the functional layer is directly or directly on both sides or one side of the base material layer in order to adjust the fixing strength between the synthetic resin molding lid molded from the resin sheet and the resin molded product (container body etc.) Laminated indirectly. When it is necessary to adjust the fixing strength, such as when it is necessary to peel off with a finger between the resin molded product and the synthetic resin molding lid, it is preferable to provide a sealant layer. In the case where it is not necessary to adjust the fixing strength, for example, in the case where the molding lid is made of the same kind of resin and the resin lid is preferable to have a high fixing strength, it may not be provided. The component of the sealant layer, its thickness, etc., depend on the component of the synthetic resin molding lid and the resin molded product fixed via the sealant layer and the fixing method (for example, physical heat fusion, chemical bonding, etc.) Can be selected as appropriate. Adhesive components in chemical adhesion include starch, glue, dextrin, vinyl acetate resin, vinyl chloride resin, vinyl polymer such as acrylic resin, natural rubber, rubber such as chloroprene rubber, butyl rubber, amino resin, epoxy resin, phenol Resin, unsaturated polyester, polyurethane, polyimide, etc. can be mentioned, but physical bonding with a sealant film for laminating that does not require adjustment of the fixing site rather than chemical bonding with a sealant layer formed by application of such an adhesive component Thermal fusion is preferred. In general, the thickness of the sealant layer is preferably in the range of 10 to 50 μm.

  When fixing with a sealant film for laminating, for example, when ultrasonically welding a resin molded product containing a polystyrene resin as a main component and a synthetic resin molding lid, the same type of resin as the base material layer is mainly used. A sealant film contained as a component can be suitably exemplified, and when a thermoplastic resin is mixed with a polystyrene resin of the same type as a resin molded product or a base material layer, the peel strength can be adjusted by the mixing amount. it can. Moreover, the sealant film which mainly has what is excellent in adhesiveness, such as a thermoplastic elastomer and an ethylene-type copolymer, can be illustrated suitably. Examples of the ethylene copolymer include an ethylene-vinyl acetate copolymer and an ethylene-unsaturated carboxylic acid ester copolymer. In the sealant layer, various additive components such as an antioxidant, a heat stabilizer, an ultraviolet absorber, a light stabilizer, a lubricant, a flame retardant, a flame retardant aid, an antistatic agent, a pigment, carbon black, Additives such as mineral oil and external lubricant can be blended. In addition, organic fine particles and inorganic fine particles can be added as long as the sealing function is not impaired.

  The adhesive strength between the sealant layer and the base material layer is preferably 3 N / 15 mm width or more, particularly preferably 5 to 8 N / 15 mm width. If the adhesive strength between the sealant layer and the base material layer is 3 N / 15 mm width or more, the delamination between the sealant layer and the base material layer may occur when the synthetic resin molding lid fixed to the resin molded product is peeled off with a finger. Occurrence can be suppressed, peeling between the resin molded product and the lid, and a sealant layer fragment caused by delamination between the base material layer and the sealant layer remains attached to the resin molded product. If the width is 5 to 8 N / 15 mm or more, a more remarkable effect can be obtained. The adhesive strength can be measured by the following method based on JIS-K6854. That is, using a tensile tester, the unbonded portions of the base material layer and the sealant layer are sandwiched with chucks, the opening degree of both layers is 180 °, and the tensile speed is 300 mm / min, and the load at that time is measured. To do. The adhesive strength can be obtained by converting the load per adhesive width of 15 mm. In addition, when better peelability between the resin molded product and the resin lid is required, the flexibility of the functional layer is greater than that of the base layer and the hardness is increased in order to obtain a comfortable peel property. It is preferable to make it smaller than that of the base material layer.

The antistatic layer as the functional layer is provided in order to suppress frictional charging and enable continuous molding of a synthetic resin molding lid from a resin sheet. Such an antistatic layer is usually laminated directly or indirectly on the base material layer on the surface opposite to the lamination surface of the sealant layer. When a sheet provided with such a functional layer is subjected to continuous cold forming, the sheet and the mold are rubbed in the mold part, and the synthetic resin molding lid is remarkably charged. As a result, the obtained resin lid is The resin lid that overlaps with the mold and is not released and overlaps with the resin lid, is charged and adhered to the periphery of the mold and the star, and the resin lid immediately after molding flies in the air. Thus, it is possible to prevent the synthetic resin molding lid from being taken out and fed, which makes it impossible to carry it. Such charging of the synthetic resin molding lid can be prevented by improving the electrical conductivity of the sheet surface and / or improving the slipperiness of the sheet surface. As an improvement in conductivity, the surface specific resistance value of the sheet surface measured in accordance with JIS-K6911 is preferably 10 ⁶ to 10 ¹⁴ Ω, and in order to improve slipperiness, in accordance with JIS-K7125. The measured static friction coefficient of the sheet surface is preferably 0.1 to 0.4.

In order to set the surface resistivity of the sheet surface to 10 ⁶ to 10 ¹⁴ Ω, for example, as an antistatic layer, a surfactant such as an antistatic agent or an antifogging agent, or a conductive substance such as a hydrophilic polymer is used. It can be prepared by coating on the surface of the resin, or it can be prepared as a sheet by kneading an antistatic agent, an antifogging agent or the like into a resin. For example, in the case of a polystyrene resin sheet, when an antistatic layer is formed by applying a conductive material or the like to the surface of a polystyrene resin substrate layer, the coating amount is preferably in the range of ^{20 to} 500 mg / m ^2. If the surface resistivity of the resin sheet is greater than 10 ¹⁴ Ω, as described above, frictional charging during continuous molding may be significant, and the resin lid may adhere to the mold part, making it difficult to take out and feed. There is. Further, in order to set the static friction coefficient of the sheet surface to 0.1 to 0.4, for example, as a functional layer, a surface lubricant such as polysiloxane resin is applied to the surface of the sheet, or surface lubricity is produced. An agent or the like can be kneaded into a resin to produce a sheet. In production of the functional layer, the polysiloxane resin can be used in the form of either an oil or an aqueous emulsion, and when applied, a coating amount in the range of 0.1 to 50 mg / m ² is preferred. As described above, an antistatic layer having an antistatic effect having a predetermined surface specific resistance value or static friction coefficient by directly kneading an antistatic agent, a surface lubricant or the like into the raw material resin of the base material layer. Can be substituted.

  The printed layer as the functional layer is provided for product display of the synthetic resin molding lid and surface decoration, and even if provided on the surface of the base material layer, It may be provided between the functional layer, but when it has other functional layers on both sides or one side of the base material layer, it may be provided between the base material layer and the other functional layer. It is preferable that the printed surface is not dropped or damaged due to friction between the sheet and the mold during cold forming. As a printing layer forming method, a method of forming by printing on the surface of the base material layer, a method of forming by laminating other functional layers on the printing surface applied to the surface of the base material layer, In addition, a method of forming the film on the back side of the other functional layer produced as a film and also using the print layer and laminating the print layer combined film so that the print surface is in contact with the base material layer, For example, a method in which a separately printed film is used as a printing layer, and this film is laminated between a base material layer and another functional layer. The printed layer may be decorated with metallic luster.

  The barrier layer as the functional layer provides the sheet with weather resistance, gas barrier property, etc. against light, gas, etc., and when the processed product formed from the sheet is a container, its lid, packaging material, etc. In order to prevent this, it is provided to add a fragrance retaining function and a function of preventing permeation of water vapor and harmful gases. The barrier layer is usually produced as a gas-impermeable film, and when another functional layer is provided on the surface of the base material layer, both surfaces of the base material layer or one of the one surface, the other functional layer and the base material It is provided between the layers, for example, between the sealant layer and the base material layer. As the gas-impermeable film, a resin film prepared from a resin containing a resin component constituting the base material layer is preferable, and an ultraviolet absorber or the like can be contained as necessary. The thickness of the gas-impermeable film forming such a barrier layer is usually in the range of 10 to 100 μm.

  By the way, as described above, the resin sheet for cold forming is usually molded at room temperature without being heated, pressed into a female mold with a male mold, and pressed at a high speed, thereby forming, bending, shearing and drawing. However, from this viewpoint, a high-speed impact test at room temperature is considered to be effective as a model evaluation method for plastic deformation of resin sheets. The resin sheet for cold forming preferably has a specific value for propagation energy and maximum load displacement when measured by a falling weight impact test method based on ASTM-D3763.

  For example, when the sheet for cold forming contains a polystyrene resin, the propagation energy in a 150 μm-thick sheet measured by a falling weight impact test method based on ASTM-D3763 is 0.015 J or more, particularly 0.02 J or more. It is preferable. If the propagation energy is 0.015 J or more, the synthetic resin molding lid that can be sufficiently plastically deformed without breaking the sheet material has a uniform shape and has shape retention, and if it is 0.02 J or more. Such an effect becomes more remarkable. Here, the propagation energy in the drop weight impact test is the absorbed energy from the displacement at the maximum load to the displacement at break in the total absorbed energy required for the fracture obtained in the drop weight impact test. In addition, the measured value obtained by the falling weight impact is a value measured at a falling speed of 5.0 M / sec using a weight of φ45 mm for the holder and φ13 mm for the hitting core.

  Similarly, when the cold forming sheet contains a polystyrene-based resin, the maximum load displacement in a 150 μm-thick sheet measured by a falling weight impact test method in accordance with ASTM-D3763 is 10.0 mm or less, particularly 9.5 mm or less. It is preferable that If the maximum load indication displacement is 10.0 mm or less, the synthetic resin molding lid that can be sufficiently plastically deformed without breaking the sheet material has a uniform shape and has shape retention, and is 9.5 mm or less. If so, this effect becomes more prominent. Here, the displacement at the maximum load in the drop weight impact test is a displacement amount (a displacement amount between the tip of the drop weight and the surface of the test piece sheet) when the load becomes maximum. In addition, the measured value obtained by the falling weight impact is a value measured at a falling speed of 5.0 M / sec using a weight of φ45 mm for the holder and φ13 mm for the hitting core.

  The cold-forming resin sheet used can be colored white or the like. In particular, when the sheet contains a polystyrene-based resin, it is preferable that one or both of the base material layer and the functional layer are colored white. When a sheet containing a polystyrene-based resin is molded, the bent portions that have undergone plastic deformation are whitened. Therefore, when these layers themselves are previously colored in white, the whitening of the bent portions due to plastic deformation can be unclear. In order to color these layers white, a sheet can be prepared by adding white pigments and dyes such as titanium oxide and zinc oxide to the raw material resin in the range of 0.5 to 8% by weight.

  The cold forming resin sheet used can be produced by a known method using a sheet extrusion apparatus, a press processing apparatus, or the like. For example, a method of coextruding a base material layer and a functional layer simultaneously using a sheet extrusion device, a method of dry laminating a base material layer and a functional layer using a two-component reaction adhesive, etc. A method of laminating a functional layer with a thermal lamination method, a method of extrusion coating a functional layer on a base material layer, a method of printing on a base material layer or a functional layer, or these methods By using together, it can manufacture as a base material layer single layer or as a laminated body of a base material layer and 1 or 2 or more functional layers.

  As described above, the cold-molding resin sheet has been described in detail. However, the thickness of the cold-molding resin sheet varies depending on the type and shape of the synthetic resin molding lid, and is not particularly limited. Recognized ones with a thickness of 0.2 mm or less and those with a thickness of 1 mm or more recognized as a thin plate are also included in the cold-molding resin sheet, but the cold-molding resin sheet contains a polystyrene resin. In the case of the sheet to be used, a thickness of 50 μm to 1 mm, particularly 80 μm to 300 μm is preferable. If the thickness of the sheet is 50 μm or more, a synthetic resin molded lid having strength can be produced from the polystyrene-based resin sheet, and if it is 80 μm or more, the effect becomes more remarkable. If the thickness is 1 mm or less, a resin lid having a shape retaining property can be obtained by plastic deformation of the sheet material during cold forming, and if the thickness is 300 μm or less, the effect becomes more remarkable.

  Cold forming resin sheets are obtained by sandwiching a packaging sheet between a pair of formers (male molds) and a molding die (female molds), pressing the sheet into the molding dies with a former, and pressing at a high speed. It is applied to a so-called press molding method in which a plastic packaging sheet is plastically deformed and shaped. Plastic deformation is a deformation that occurs when the material exceeds the elastic limit. When a stress above the yield point is applied to the material, the deformation becomes significant, and a resin lid having shape retention can be obtained. Can be appropriately selected depending on the type of the resin sheet, the shape of the resin lid, and the like, and is not particularly limited. As described above, high-speed pressing is usually performed at room temperature or normal temperature without heating, but in some cases, under low-temperature heating, substantially less than the glass transition point (Tg) of the resin constituting the resin sheet. For example, when the resin sheet is a polystyrene resin sheet, it can be performed at a temperature of less than 80 ° C., preferably 10 to 60 ° C., and further at room temperature or room temperature.

  In addition, the container body (resin molded product) to which the synthetic resin molding lid is fixed is not limited to any material, shape or form. The material of the resin molded product may be any material, but the same type of resin as the synthetic resin molded lid is preferable. For example, PS (polystyrene) resin, AS (styrene-acrylonitrile copolymer) resin, ABS (acrylonitrile-) Butadiene-styrene copolymer) resin, PS resin such as AXS (acrylonitrile and terpolymer having styrene component) resin, PET resin such as unsaturated polyester resin and saturated polyester resin, high density polyethylene, low density Polyethylene resins such as polyethylene, EVA (ethylene-vinyl acetate copolymer) resin, EVOH (ethylene-vinyl alcohol copolymer) resin, polypropylene resins, other polyolefin resins, polyacetal resins, polycarbonate resins Illustrate those containing Bets can be, may be those which contain one or more of these, among these, in particular, PS resins, ABS resins, those containing PET-based resin. In addition, for these resins, additives such as plasticizers, stabilizers, flame retardants, antioxidants, ultraviolet absorbers, colorants, antistatic agents, and auxiliary materials additives such as reinforcing agents and fillers are appropriately used. May be added. The shape and form of the resin molded product containing such a resin may be any of films, sheets, plates, bars, pipes, laminates, fibers, nets, nonwoven fabrics, various containers, packaging materials, parts of various devices, etc. The molding method may be any of compression molding, transfer molding, lamination molding, injection molding, extrusion molding, blow molding, calendaring, casting, and the like.

  The sealing device is not particularly limited as long as it is a device that can seal the molding lid to the upper end opening of the container body to form a sealed container, such as a bonding device or a welding (fusion) device. , Hot plate welding equipment, hot air welding equipment, impulse welding equipment, ultrasonic welding equipment, etc., but among these, ultrasonic welding equipment, in particular, molding lids, can be welded more uniformly and at high speed. An ultrasonic sealing device (see PCT / JP02 / 02225) that applies ultrasonic rotational vibration in a rotational direction about an axis parallel to the pressurizing direction for pressurizing the container body can be preferably exemplified. For example, ultrasonic welding between an open resin container and a lid made of a resin sheet having a sealant layer is performed using an ultrasonic welding apparatus having a specific specification for a specific application in addition to a normal ultrasonic welding apparatus. It can be carried out by applying an ultrasonic wave having a frequency of 15 to 50 kHz, preferably 20 to 40 kHz, and an amplitude of 16 to 126 μmpp, preferably 40 to 80 μmpp to the adhesive surface. As conditions for such ultrasonic welding, for example, when a cold-formed lid is sealed in a polystyrene resin container opening to form a sealed container, the frequency is 20 to 40 kHz, the output is 50 to 100 w / piece, and the irradiation time is 0.2 to 1 second is preferable, and the lid of a resin container such as a beverage container welded under such conditions can be peeled with a finger, and the peel strength is such that the lid does not peel even if the sealed container is inadvertently dropped. can get. In addition, as an adhesive device, various adhesives are applied to a predetermined surface of a resin lid or a resin molded product, or a sealant layer containing an adhesive component is provided on a cold molding resin sheet. By using a sealant layer that provides a fixing strength that can be peeled off from the resin molded product with a finger, an apparatus that can adjust the fixing strength and pressurize and weld appropriately can be exemplified.

  As the adhesive strength between the resin molded product and the synthetic resin molding lid, the peel strength is preferably in the range of 6 to 20 N / 15 mm width in the 180 ° peel test according to JIS-K6854, and more preferably 8 to 15 N / 15 mm. More preferably, the width is within the range. The peel strength is obtained by welding a sheet made of a resin raw material having the same composition as that of the resin molded product and a cold-molding resin sheet by, for example, ultrasonic welding, and setting the opening degree of both sheets to 180 °. When the peel strength is 6 N / 15 mm width or more, and the resin molded product is a beverage container, the lid can be removed from the container even if it is dropped with the contents filled. It will not peel off and the contents will not leak, and if the peel strength is 20 N / 15 mm width or less, it will not be difficult to peel the lid by hand. It is more preferable that the peel strength is in the range of 8 to 15 N / 15 mm width because the above-described effects can be obtained more reliably.

  The synthetic resin molding lid basically has the form and physical properties possessed by the cold molding resin sheet. That is, it may be composed of only a base material layer as a single layer structure, but may have a functional layer laminated on one side or both surfaces of the base material layer, Examples thereof include a sealant layer having an adhesive function, an antistatic layer having an antistatic function, a printing layer, a barrier layer, and the like. The base material layer preferably contains a composition comprising 100 to 70% by weight of impact-resistant polystyrene (A) and 0 to 30% by weight of styrene-butadiene copolymer (B). Since the impact polystyrene (A) has soft component particles having a degree of swelling of 30 or less and an average particle diameter in the range of 0.5 to 10 μm, a lid having excellent shape retention can be obtained. ,preferable. Moreover, the sealant layer, antistatic layer, printing layer, barrier layer and the like laminated as the functional layer have the same functions and configurations as those functional layers in the cold-molding resin sheet.

  In the sealed container provided with the synthetic resin molding lid, it is preferable that the lid and the resin container contain the same kind of resin as a main component from the viewpoint of improving recyclability. In particular, those in which both the lid and the resin container contain a polystyrene resin as a main component are preferably excellent in tensile strength, heat resistance, light resistance, moldability, and surface gloss, and further, have impact polystyrene as a main component. What was produced using the resin sheet to contain is preferable since it is excellent in impact resistance without a damage | wound, even if a container is dropped carelessly. Further, when the peel strength between the lid and the open resin container is in a range corresponding to 6 to 20 N / 15 mm width in the 180 ° peel test by ultrasonic welding or the like, The beverage stored in the resin container can be drunk without causing separation between the resin container and the resin container.

  As described above, the secondary lid forming device of the present invention can be used to squeeze means or squeeze / twist for the lid skirt portion of the sealed container, which can form the lid of the sealed container formed by the primary lid molding device into the final lid shape. If it is an apparatus having means, there is no particular limitation, and the “final lid shape” here means a lid shape that is substantially the same as a lid shape in a product container using a lid material based on a conventional aluminum staying layer. The “squeezing means for the lid skirt part of the sealed container” means means for squeezing or tightening the lid skirt part of the sealed container, and “squeezing / twisting means for the lid skirt part of the sealed container” Means for twisting the lid skirt portion or the sealed container body with the lid skirt portion squeezed or tightened, or the lid skirt portion and the sealed container body with the lid skirt portion of the sealed container being squeezed or tightened Each other It refers to the means to twist in the opposite direction. It is preferable to provide a step of heating the lid skirt portion of the sealed container by the heating means as a pre-step of the squeezing step or the squeezing / twisting step of the sealed container by the squeezing unit or the squeezing / twisting unit.

  Examples of the secondary lid forming apparatus having the drawing means include a secondary lid forming apparatus having means capable of fitting the lid skirt portion of the placed sealed container into the fitting hole or the fitting recess. Further, as the secondary lid forming apparatus having the drawing / twisting means, the drawing means having a fitting hole or a fitting recess into which the lid skirt portion of the placed sealed container can be fitted, and the lid skirt portion being squeezed. , A means for twisting the lid skirt part and / or the sealed container body, that is, a means for twisting the lid skirt part or the sealed container body, or a secondary lid having means for twisting the lid skirt part and the sealed container body in opposite directions In addition to the forming device, the sealed container is forcibly rotated and transferred by a combination of a transfer conveyor and a screw conveyor having a difference in transfer speed. A secondary lid that contacts a toothed belt that rotates in the same direction as the rotation direction and causes the lid skirt portion of the sealed container to twist due to friction between the lid skirt portion and the toothed belt. Mention may be made of a shape equipment.

  As the throttle means having a fitting hole or a fitting recess into which the lid skirt of the sealed container placed above can be fitted, a container base for placing the sealed container, and a lid skirt of the sealed container placed on the container base The female molding member having a fitting hole or a fitting concave portion into which the portion can be fitted, and the container base and / or the female molding member, the lid skirt portion of the hermetic container is fitted in / out of the female molding member fitting hole or fitting concave portion An example of the diaphragm means includes an elevating mechanism that moves the parts closer to and away from each other. For example, the container base may be a transport conveyor that is transported in a straight line, and in this case, the forming means may be operated in a box motion so that the upper end portion of the sealed container is inserted and withdrawn from the forming hole of the forming means. . Examples of the female molding member include a female molding member (simple insertion type female molding member) having a fitting hole or a fitting recess into which a lid skirt portion of a sealed container placed on a container base can be fitted, or a cylinder thereof. An extruding piston having a fitting hole or a fitting recess into which the lid skirt of the hermetic container can be fitted at the lower end thereof, and urging the pushing piston toward the opening end of the forming hole. And a female molding member (extrusion piston insertion type female molding member).

  Further, as the lid skirt portion twisting means in the means for twisting the lid skirt portion and / or the sealed container main body with the lid skirt portion being squeezed, the lid skirt portion of the sealed container is used in the simple insertion type female molded member Means for rotating a female molding member having a fitting hole or a recessed portion into which the insertion piston can be inserted, and particularly a means for rotating the extrusion piston in an extrusion piston insertion type female molding member. , A means for rotating with a small servo motor directly connected to the piston rod of the female molding member and the extrusion piston, and a toothed belt in which the gear fixed to the piston rod of the female molding member and the extrusion piston is stretched around a plurality of pulleys In addition, as the means for twisting the sealed container body, there is a conveyance speed difference in the conveyance speed. A means for rotating the sealed container body by transferring the sealed container by a combination of a conveyor and a screw conveyor, or a container table in which the sealed container body is fixed by a container holder, and a sealed container with the longitudinal axis of the sealed container body as the rotation axis A means for rotating the main body can be exemplified.

  The heating means is not particularly limited as long as it is a means capable of heating the lid skirt portion of the sealed container. However, a means capable of heating the entire circumference of the lid skirt portion, particularly uniformly, is preferable. For example, a hot air nozzle that injects hot air toward the lid skirt portion of the sealed container can be exemplified, and in this case, a rotating means for rotating and transporting the sealed container with the longitudinal axis of the sealed container as a rotation axis is also provided. It is preferable. Furthermore, it is more preferable to provide a hot air cover above the conveyance path for rotating and transporting the sealed container in order to maintain the heated state of the lid skirt portion of the sealed container heated by the hot air. In addition, a heating means provided with a heating mechanism in the vicinity of the insertion hole or the insertion concave portion into which the lid skirt portion of the sealed container of the female molding member can be inserted can be suitably exemplified.

  Among the secondary lid forming apparatus of the present invention, as described in the embodiment, a container base for placing a sealed container, and a fitting hole into which a lid skirt portion of the sealed container placed on the container base can be fitted Alternatively, the female molding member having the fitting recess and the container base and / or the female molding member are close to each other so that the lid skirt portion of the hermetic container can be fitted and retracted into the fitting hole or the fitting recess of the female molding member. The female mold member is provided so as to be reciprocable within the cylindrical hollow portion, and has a fitting hole or a fitting recess into which the lid skirt portion of the sealed container can be fitted. An extrusion piston, and a means for urging the extrusion piston toward the opening end of the molding hole, and a gear fixed to the piston rod of the extrusion piston is rotated by a toothed belt spanned by a plurality of pulleys. , Lid scar A device provided with a means for twisting the lid skirt portion with the portion squeezed can be preferably exemplified, and in particular, the lid skirt of the sealed container before twisting the lid skirt portion with the lid skirt portion squeezed Heating means for heating the part, for example, a hot air nozzle for injecting hot air toward the lid skirt part of the sealed container, and a rotating means for rotating and transporting the sealed container with the longitudinal axis of the sealed container as a rotation axis Those having means are particularly preferred.

  Hereinafter, the present invention will be described more specifically with reference to the drawings. However, the technical scope of the present invention is not limited to these examples.

  FIG. 1 is an overall plan view showing an embodiment of a filling and packaging machine to which the secondary lid forming apparatus of the present invention is applied. As shown in FIG. 1, the filling and packaging machine includes a container supply device A that supplies a synthetic resin bottomed cylindrical container body to a filling device, a filling device B that fills the supplied container body with contents, and a disc-shaped lid. A primary lid molding apparatus C for molding a synthetic resin molding lid having a main body and a skirt portion provided in a hanging shape on the periphery of the lid main body from a sheet-like lid material, at the upper end opening of the container main body filled with contents The lid supply device D for supplying the molding lid, the sealing device E for sealing the molding lid to the upper end opening of the container body to form a sealed container, and the lid of the sealed container molded by the primary lid molding device into the final lid shape A secondary lid molding apparatus F of the present invention for molding is provided.

  The container supply device A includes a container settling device A-1, a transport conveyor A-2, and a screw conveyor A-3. In the container settling device A-1, a bottle-shaped synthetic resin is supplied in any direction. The containers are erected so that the upper end opening faces upward, and are placed in a row on the conveyor A-2. The containers placed on the transport conveyor A-2 are transported downstream, and are aligned at a predetermined pitch by the screw conveyor A-3 at the downstream portion of the transport conveyor. The aligned containers are fed to the filling device B via the inlet star foil A-4. In the filling apparatus B, the contents are filled into the container while the container is rotating and moving inside the apparatus. The container filled with the contents is transferred to the intermediate star foil B-8.

  A primary lid cold forming apparatus C is provided in the vicinity of the filling apparatus B of the filling and packaging machine. In the primary lid cold forming apparatus C, the synthetic resin sheet-like lid material S is punched into a substantially disc shape, and the punched lid material is substantially U-shaped in cross section, that is, the disc-like lid body P-21 and the lid body. It shape | molds in the lid | cover P-2 which consists of the skirt part P-22 provided in the hanging form from the peripheral part (refer FIG. 7). The formed lid P-2 is placed on the upper end opening of the container being conveyed by the intermediate star wheel B-8.

  Next, the container filled with the contents and covered with the lid is supplied to the sealing device E. In the sealing apparatus E, the lid is sealed and sealed while the container moves in the apparatus. The sealed container is placed on the transfer conveyor F-4. The containers placed on the transport conveyor F-4 are transported downstream, and are aligned at a predetermined pitch by the screw conveyor F-3 at the downstream portion of the transport conveyor. The aligned containers are supplied to the secondary lid forming apparatus F through the inlet star wheel F-5. In the secondary lid forming apparatus F, while the container moves in the apparatus, the lid sealed by the container is secondarily formed into a final shape container. The final-shaped containers are discharged to the transport conveyor F-4 through the outlet star wheel F-7.

  FIG. 2 shows a longitudinal sectional view of the filling device B. As shown in FIG. 2, the filling device B includes a filling liquid tank B-1 having a circular shape in plan view, a filling nozzle B-2 provided in a predetermined number downward at equal intervals on the lower surface of the peripheral edge of the filling liquid tank, and a filling nozzle. It has the container mounting base B-3 provided in the lower filling nozzle corresponding position, and the turntable B-4 to which the container mounting base B-3 is attached. The turntable B-4 and the filling liquid tank B-1 are fixed to the filling device drive shaft B-5, and rotate integrally with the drive shaft B-5. The container mounting table B-3 is fixed to the rotating table B-4 and is fixed to the fixing unit B-31 extending upward from the rotating table. The container mounting table B-3 is fitted on the fixing unit B-31 so as to be slidable in the vertical direction. It consists of an upper end closed cylindrical moving part B-32 closed by the top surface. The moving part B-32 is urged upward by a spring B-33 provided upward in the middle of the fixed part B-31. A roller shaft B-34 is provided outwardly of the lower part of the moving part B-32, and a rotatable roller B-35 is provided on the roller shaft B-34. A cam B-6 that contacts the roller B-35 and regulates the position of the moving part B-32 is provided outside the container mounting table B-3. A container holder B-7 having a substantially U-shaped horizontal section is provided on the top surface of the moving part B-32, and the container body P-1 is positioned from the inside thereof. A guide (not shown) is provided outside the container holder B-7 along the container movement path, and the container positioned by the container holder B-7 is guided and conveyed along the guide.

  When the container main body P-1 has been transported to the container carry-in position, the moving part B-32 of the container mounting base B-3 is pushed down by the cam B-6, and the top surface of the moving part B-32 is placed on the container P-1. Is lowered to a level where can be placed. When the container main body P-1 is placed on the container placing table B-3 and starts to rotate within the filling device B, the moving part B-32 of the container placing table B-3 gradually starts to be regulated by the cam B-6. And is moved upward by the biasing force of the spring B-33. The container on the container mounting table B-3 is pressed against the filling nozzle B-2 by the urging force of the spring B-33. When the container main body P-1 is pressed by the filling nozzle B-2, the filling valve of the filling nozzle B-2 is released, and the filling liquid is filled in the container. When the filling is completed, the moving part B-32 of the container mounting table B-3 is gradually pushed down to a level at which the container main body P-1 can be transferred to the intermediate star wheel B-8 by the cam B-6. The container main body P-1 is transferred to the intermediate star wheel B-8 at the container carry-out position.

  3 shows the entirety of the primary lid cold forming apparatus C, and FIG. 4 shows the sheet-like lid material S. As shown in FIG. 3, the primary lid cold forming apparatus C includes a lid roll C-1, a lid automatic joining apparatus C-2, a half cut forming apparatus C-3, a lid punching molding apparatus C-4, and a collection roll. C-5. The synthetic resin sheet-like lid material S wound in a roll shape is guided to the half-cut forming device C-3 via the lid material automatic joining device C-2. The half-cut forming device C-3 forms a substantially U-shaped groove S-1 in the sheet-like lid S with a laser C-31 as shown in FIG. The groove S-1 ensures the openability when a straw is inserted into the lid P-2 of the container. In FIG. 4, S-2 indicates a lid punching planned line, and S-3 indicates a lid punching hole. The sheet-like lid material S in which the groove S-1 is formed by the half-cut forming device C-3 is guided to the lid punching and forming device C-4 shown in FIG.

  In FIG. 5, 1 or 2 from the sheet-like cover material S provided with a movable blade (male blade) C-41, a fixed blade (female blade) C-42, and a pressing member C-43 for the sheet-like cover material S. The lid material punching means for punching the above lid material, the molding die C-44 (see FIG. 6) provided with a plurality of grooves C-441 on the inner peripheral surface thereof, and the molding die C-44 are provided. Sectional drawing of the lid punching molding apparatus C-4 provided with the lid | cover push-back piston C-45 and the lid | cover molding means which has the former | former C-48 formed in the edge part of the former reciprocating operation rod C-47. It is shown. When the sheet-like lid S is intermittently fed from above to below and the punched portion reaches a position corresponding to the forming die C-44, the movable blade C-41 moves forward and cooperates with the fixed blade C-42. 1 or 2 or more disk-shaped cover materials are punched from the sheet-shaped cover material S, and the punched cover is formed in a substantially U-shaped cross section. At this time, the front end surface of the former C-48 advances until it comes into contact with the packaging material S, and further advances to a predetermined position after punching to push the lid pushing-back piston C-45. As the former C-48 advances, the lid pushing-back piston C-45 moves backward against the force of the spring C-451, so that the lid material portion (of the lid P-2 of the lid P-2) outside the inner diameter of the forming die C-44. The portion forming the skirt portion P-22) is bent at the bent portion P-23, and is sandwiched between the inner peripheral surface of the forming die C-44 provided with the groove C-441 and the outer peripheral surface of the former C-48. The lid is guided to the skirt portion P-22 of the lid by the plurality of grooves C-441 provided on the inner peripheral surface of the molding die C-44, and the lid main body (flat portion) P -21 and a skirt portion P-22 are formed into a lid P-2 (see Fig. 7). After molding, as the former C-48 moves backward and returns to its original position, the piston C-45 moves forward by the repulsive force of the spring C-451 and pushes back the molded lid P-2. The lid P-2, which is pushed back and formed into a substantially U-shaped cross section, is dropped to the lower lid feeding device (chute) D, and the upper end opening of the container P-1 being conveyed by the intermediate star wheel B-8 One lid is put on each part. The sheet-like lid material from which the lid is punched is collected by a collection roll C-48. As described above, the lid punching and forming apparatus C-4 is not provided with a heating mechanism, and is capable of forming a lid by causing plastic deformation of a resin sheet-like lid material by cold forming.

  The container filled with the contents and covered with the lid is then supplied to the sealing device E. An overall cross-sectional view of one embodiment of the sealing device E is shown in FIG. The sealing device E includes an upper rotary table E-2 in which a predetermined number of ultrasonic sealing devices E-1 are fixed at equal intervals on the peripheral portion thereof, and a container table E at a position below the ultrasonic sealing device. -3 is fixed to the lower rotary table E-4. The upper rotary table E-2 and the lower rotary base E-4 are fixed to the seal device drive shaft E-5. Above the ultrasonic sealing device E-1, a control device E-6 of the sealing device E is provided. The ultrasonic sealing device E-1 has a sealing device main body E-11 fixed to the upper rotary table E-2, a round bar shape protruding downward from the sealing device main body E-11, and having a sealing action surface at the lower end. Horn E-12, and a sealing device main body E-11 incorporates a vibrator (not shown). Vibration is transmitted to the sealing surface of the horn E-12 by such a vibrator. By the same mechanism as the lifting mechanism in the container mounting table B-3 of the filling device B, the container P on the container table is raised by the horn E-12 of the ultrasonic sealing device E-1 by raising the container table E-3. The container main body P-1 and the lid P-2 are heat-sealed.

  The secondary lid forming apparatus F of the present invention is illustrated in FIGS. 9 to 14, FIG. 9 is a plan view of the secondary lid forming apparatus F, and FIG. 10 is a secondary lid in the secondary lid forming apparatus F. It is a longitudinal cross-sectional view of a shaping | molding apparatus main body. FIG. 14A shows a cross section of the primary molded lid and the container main body before sealing, and FIG. 14B shows a cross section of the primary molded lid and the container main body after sealing. (C) shows a cross section of the lid and the container body after the secondary molding.

  The secondary lid forming apparatus F includes a heating means for heating the lid skirt P-22 sealed at the upper end of the sealed container, and a rotation for rotating the container around its longitudinal axis at the container lid heating position by the heating means. And a secondary lid forming apparatus main body F-1 for secondary molding of the lid of the container. The heating means is composed of a pipe-shaped hot air nozzle F-2 provided along the lid skirt of the container being transported before being carried into the secondary lid forming apparatus main body. A rotation means rotates a container by the conveyance speed difference of the screw conveyor F-3 and the conveyance conveyor F-4. The secondary lid forming device main body F-1 has an upper rotary table F-12 and a lower rotary table F-13 fixed to the drive shaft F-11 of the secondary lid molding device F. The lower rotating base F-13 is provided with a container base F-131 for placing a plurality of containers at equal intervals on the peripheral edge thereof, and a container holder F-132 is fixed to the upper part of the container base F-131. Yes. The upper rotary table F-12 is provided with a molding means having a molding hole into which the upper end portion of the sealed container P placed on the container table F-131 can be inserted at a position above the container table F-131. It has been. The container base F-131 has an elevating mechanism similar to the above-described filling device B and sealing device E.

  The sealed containers P on the conveyor belt F-41 conveyed by the conveyor F-4 are first aligned at a predetermined pitch by the screw conveyor F-3. The aligned sealed containers P are supplied to the secondary lid forming apparatus main body F-1 by the concave portion of the inlet star wheel F-5 and the guide F-6. A pipe-shaped hot air nozzle F-2 is provided at a position along the lid skirt P-22 of the sealed container P being conveyed from the screw conveyor F-3 to the inlet star wheel F-5. The hot air nozzle F-2 is provided with a hot air blowing hole directed to the lid skirt P-22. The lid skirt P-22 of the container is heated by the hot air blown from the hot air blowing hole. There is a speed difference between the transport speed of the transport conveyor F-4 and the transport speed of the screw conveyor F-3, and the sealed containers P being aligned on the screw conveyor F-3 are rotated by this speed difference. The sealed container P being conveyed by the inlet star wheel F-5 is also rotated by the frictional resistance with the guide F-6. By rotating the sealed container P, the entire peripheral surface of the lid skirt P-22 of the container can be heated uniformly. 9 and 11, the hot air nozzle F-2 is provided only on the left side in the container transport direction, but it is preferable to provide it on both sides in order to increase the capacity (speed increase) of the filling and packaging machine. Furthermore, it is more preferable to provide a hot air cover (not shown) above the container conveyance path from the screw conveyor F-3 to the inlet star wheel F-5.

  FIG. 12 is an enlarged cross-sectional view of the forming portion F-14 of the forming means. The molding part F-14 is provided with a cylindrical female die F-141 in which a molding hole is formed, and a fitting recess that is slidably provided in the molding hole and into which the lid skirt P-22 can be fitted. It has an extrusion piston F-142. A spring retainer F-143 is fixed to the other end of the cylindrical female die F-141, and the push-out piston F-142 is directed toward one end open side of the forming hole by a spring F-144 abutting against the spring retainer F-143. Is energized. A piston rod F-145 that penetrates the spring retainer F-143 and extends to the other end side of the cylindrical female die F-141 is connected to the extrusion piston F-142. A stopper F-146 and a gear F-147 are fixed to the tip of the piston rod F-145. By the stopper F-146, the extrusion piston F-142 biased toward one end side of the molding hole can be stopped near the opening end of the molding hole.

  FIG. 13 is an enlarged cross-sectional view of the vicinity of one end of the forming hole. An insertion recess F-148 is formed on the contact surface of the extrusion piston F-142 with the lid skirt P-22 as described above, and the lid skirt P-22 has an insertion recess having a smaller diameter than the molding hole. The lid skirt P-22 is fitted into the fitting recess of the extrusion piston F-142 by being fitted into F-148 and the top surface of the lid is brought into contact with the abutting surface which is the bottom of the fitting recess of the extrusion piston. Will be.

  The secondary lid molding apparatus main body F-1 includes a molding auxiliary portion F-15 having a toothed belt F-153 spanned between one driving pulley F-151 and two driven pulleys F-152 ( 9), the gear F-147 meshes with the toothed belt F-153 that is continuously rotated clockwise in a plan view at a predetermined position of the circumferential path of the gear F-147. ing.

  Next, the secondary lid forming process will be described. The sealed container P in which the peripheral surface of the lid skirt P-22 is heated is sequentially placed on the container table F-131. The sealed container P on the container table is gradually raised by the lifting mechanism described above. The lid skirt P-22 of the raised sealed container P is pressed into a molding hole formed in the cylindrical female mold F-141, and when the container base F-131 reaches the ascent limit, the lid upper surface P-21. Comes into contact with the bottom of the insertion recess F-148 of the extrusion piston F-142, and the heated lid skirt P-22 is inserted into the insertion recess F-148 of the extrusion piston F-142. The squeezing force is applied, the gear F-147 is rotated by the driving force of the toothed belt F-153, and the extrusion piston F-142 is rotated via the piston rod F-145. Rotational force acts on the sealed container P by the rotation of F-142, but the container body P-1 is restricted in rotation by the container holder F-132, so the lid sealed on the container body P-1 The ska Twisting force is applied in a state where bets P-22 parts are tightened by the fitting. In this way, the secondary action of the lid is ensured by the cooperative action of the drawing force and the twisting force, and as shown in FIG. Become. After completion of the secondary molding, the container base F-131 is lowered, the lid P-2 is pushed out of the molding hole by the extrusion piston F-142, and the sealed container P on the container base is passed through the outlet star wheel F-7. It is discharged onto the conveyor F-4.

1 is an overall plan view of an embodiment of a filling and packaging machine to which a secondary lid forming apparatus of the present invention is applied. It is a longitudinal cross-sectional view of the filling apparatus in the filling packaging machine shown in FIG. It is the schematic of the primary lid cold forming apparatus in the filling packaging machine shown in FIG. It is a top view of the sheet-like cover material in the process of punching out the cover in the primary cover cold forming apparatus shown in FIG. It is a longitudinal cross-sectional view of the lid punching forming apparatus in the primary lid cold forming apparatus shown in FIG. It is a perspective view of the shaping | molding die in the lid punching shaping | molding apparatus shown in FIG. It is a perspective view of the lid | cover shape | molded by the primary lid cold forming apparatus shown in FIG. It is a longitudinal cross-sectional view of the sealing device in the filling and packaging machine shown in FIG. It is a top view of the secondary lid forming apparatus in the filling and packaging machine shown in FIG. It is a longitudinal cross-sectional view of the secondary lid molding apparatus main body in the secondary lid molding apparatus shown in FIG. It is a longitudinal cross-sectional view of the container on the conveyance conveyor in the secondary lid forming apparatus shown in FIG. It is a longitudinal cross-sectional view of the shaping | molding process part in the secondary lid molding apparatus main body shown in FIG. FIG. 13 is an enlarged longitudinal sectional view in the vicinity of one end portion of a forming hole in the forming portion shown in FIG. 12. It is a longitudinal cross-sectional view which shows the shape of the lid | cover of a formation process.

Explanation of symbols

A Container supply device A-1 Container settling device A-2 Conveyor A-3 Screw conveyor A-4 Inlet star wheel B Filling device B-1 Filling liquid tank B-2 Filling nozzle B-3 Container mounting table B-31 Fixed part B-32 Moving part B-33 Spring B-34 Roller shaft B-35 Roller B-4 Turntable B-5 Filling device drive shaft B-6 Cam B-7 Container holder B-8 Intermediate star wheel C Primary lid Molding device C-1 Lid material roll C-2 Lid material automatic joining device C-3 Half cut forming device C-31 Laser C-4 Lid punching molding device C-41 Movable blade (male blade)
C-42 Fixed blade (female blade)
C-43 Pressing member C-44 Molding die C-441 Groove C-45 Piston for lid pushing back C-451 Spring C-46 Piston rod C-47 Former reciprocating operation rod C-48 Former C-5 Recovery roll D Lid feeding device (chute)
E Sealing device E-1 Ultrasonic sealing device E-11 Sealing device body E-12 Horn E-2 Upper rotating table E-3 Container base E-4 Lower rotating base E-5 Sealing device drive shaft E-6 Controller F Secondary lid molding device F-1 Secondary lid molding device main body F-11 Drive shaft F-12 Upper rotating base F-131 Container base F-132 Container holder F-14 Molding section F-141 Cylindrical female mold F- 142 Extrusion Piston F-143 Spring Press F-144 Spring F-145 Piston Rod F-146 Stopper F-147 Gear F-148 Fitting Recess F-15 Molding Auxiliary F-151 Drive Pulley F-152 Driven Pulley F-153 Teeth With belt F-2 Pipe-shaped hot air nozzle F-3 Screw conveyor F-4 Conveyor F-41 Conveyor belt F-5 Inlet star wheel F-6 Guide F-7 Exit star foil S Synthetic resin sheet-like lid, packaging material S-1 Substantially U-shaped groove P Container P-1 Container body P-2 Lid P-21 Disc-shaped lid body, Lid upper surface P-22 Skirt part P-23 Bending part

Claims (9)

Synthetic resin bottomed cylindrical container filled with a synthetic resin molding lid having a disc-shaped lid body molded by a primary lid molding apparatus and a skirt portion provided in a suspended manner on the periphery of the lid body. A secondary lid molding apparatus for molding a lid of a sealed container sealed in an upper end opening of a main body into a final lid shape, characterized by having a squeezing means or a squeezing / twisting means for a lid skirt portion of the sealed container. Next lid forming device. The squeezing / twisting means of the lid skirt part of the sealed container has a squeezing means having a fitting hole or a fitting recess into which the lid skirt part of the placed sealed container can be fitted, and the lid skirt part is squeezed. The secondary lid forming apparatus according to claim 1, further comprising: means for twisting the portion and / or the sealed container main body. A throttling means having a fitting hole or a fitting recess into which the lid skirt portion of the sealed container placed can be fitted, and a container base for placing the sealed container and a lid skirt portion of the sealed container placed on the container base. The female mold member having a fitting hole or a recess that can be inserted, and the container base and / or the female mold member, the lid skirt portion of the sealed container may be inserted into and retracted from the hole or recess of the female mold member. The secondary lid forming apparatus according to claim 2, further comprising an elevating mechanism for moving the apparatus close and apart as much as possible. The female molding member is provided so as to freely reciprocate within the cylindrical hollow portion, and an extrusion piston having an insertion hole or an insertion recess into which the lid skirt portion of the sealed container can be fitted at the lower end thereof, and an extrusion piston are molded. 4. A secondary lid forming apparatus according to claim 3, further comprising means for biasing toward the opening end of the hole. The means for twisting the lid skirt portion and / or the sealed container body with the lid skirt portion being squeezed is a means for rotating the gear fixed to the piston rod of the extrusion piston with a toothed belt spanned across a plurality of pulleys. The secondary lid molding apparatus according to any one of claims 2 to 4, wherein A heating means for heating the lid skirt portion of the sealed container provided before the squeezing step or the squeezing / twisting step of the sealed container lid skirt portion by the squeezing means or the squeezing / twisting means is provided. Item 6. A secondary lid molding apparatus according to any one of Items 1 to 5. The heating means includes a hot air nozzle for injecting hot air toward the lid skirt portion of the sealed container, and a rotating means for rotating and transporting the sealed container with the longitudinal axis of the sealed container as a rotation axis. Item 7. A secondary lid molding apparatus according to Item 6. The secondary lid forming apparatus according to claim 7, wherein a hot air cover is provided above a conveyance path for rotating and transporting the sealed container. The secondary lid molding apparatus according to claim 1, wherein the primary lid molding apparatus is a primary lid cold molding apparatus.

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