CN106273367A - The heating means of preform, the manufacture method of band bottom tube-like container and preform - Google Patents

Abstract

The present invention provides a kind of: and implementing Biaxially stretched blow-molded with suitably heating preform in the way of there is thermal deformation, manufacture the manufacture method of container at the bottom of band.The preform of the tabular used that is in advance products formed (10) have plate-like main body (12) and edge flange (13).Plate-like main body (12) is carried out Biaxially stretched blow-molded and becomes the container body portion of container at the bottom of band (1), and edge flange (13) is not carried out Biaxially stretched blow-molded and is directly becoming the mouth flange of container at the bottom of band (1).Transport when the heating face (31a, 32a) utilizing upper and lower heater (31,32) clamps plate-like main body (12) of products formed (10) in advance, and it is carried out contact heating, it is heated to carry out Biaxially stretched blow-molded temperature, then plate-like main body (12) is implemented Biaxially stretched blow-molded.

Description

The heating means of preform, the manufacture method of band bottom tube-like container and preform

Technical field

The present invention relates to a kind of preforming being made up of thermoplastic resin to products formed the most in advance etc. Body carries out cylinder at the bottom of the Biaxially stretched blow-molded band thus manufacturing the band bottom tube-like containers such as cup-like containers The manufacture method of shape container.More specifically, relate to be suitable for manufacturing small-sized, thin-walled light weight Band bottom tube-like container preform and, this preform is heated and be sent to blowing The heating means of the preform in mould.

Background technology

As by the Biaxially stretched blow-molded band bottom tube-like container manufactured, it is commonly known that such one Kind container: the beaker shape container of the thermoplastic resin used as containers such as milk product.Greatly Mouthful cup-like containers has: the upper end open phase of the cylindric body portion at the bottom of band and this cylindrical shape body portion The mouth flange even and extended laterally.It addition, also have: mouth flange and cylindric body portion it Between be accompanied with the big mouth container of shape of constriction (neck portion) of slightly path.Cylinder at the bottom of this band Shape container is usually, in the bonding made with aluminum foil in the surface of its mouth flange, tree after being filled with content Fat synthesizes the lid of grade made of paper and is sealed.

As band bottom tube-like container, it is known that: injection-molded article, vacuum compression air forming product and The Biaxially stretched blow-molded product of preform (products formed, one-shot forming product in advance).Use poly-third The resin such as alkene, polystyrene manufactures injection mo(u)lding container, and wall thickness is about 0.5mm, heavier, oxygen Gas barrier is the worst.Although using the monolayer being made up of polyethylene terephthalate (PET) The composite wafer of the resin of thin slice or multiple types, manufactures vacuum compression air forming container, but, The most mostly can produce burr, yield rate is relatively low.It addition, thin slice easily occurs splitting broken during molding, because of This, be not used for the molding of the deeper container in bottom.Biaxially stretched blow-molded container then will not hairiness Thorn produces, oxygen-barrier property is the most excellent, may be used for the molding of the deeper container in bottom.

About band bottom tube-like containers such as cup-like containers, it is then pole to reduce its cost realize lightweight It is effective.But, about Biaxially stretched blow-molded container, then it is difficult to lightweight.Such as, The weight of the Biaxially stretched blow-molded cup sold currently on the market, in the case of being 200 milliliters of cups, It is about 11～14g.It addition, be used in the products formed in advance of the Biaxially stretched blow-molded cup of manufacture It is shaped as hemispherical, coniform or hangs mitriform, generally, being injection-molded article.Blow in stretching Time molded, need preform is heated, until being suitable for stretch blow-molded temperature, In the case of PET in advance products formed, about it is heated to 100 DEG C.In order to Biaxially stretched blow becomes The lightweight of type cup, as long as realizing the lightweight of preform.In other words, as long as by preforming System becomes thin-walled.

But, the wall thickness of preform cross thin in the case of, it is possible to easily damage it because of heating Self conformality, when being heated to be suitable for the moment of Biaxially stretched blow-molded temperature, meeting cannot Maintain original shape, deform and lose shape, hinder Biaxially stretched blow-molded.Thus, it is desirable to will The wall thickness of the cup-shaped products formed in advance used to manufacture cup-like containers makes the thickness more than 2mm, Its thin-walled, lightweight are limited.Therefore, cup-shaped that is Biaxially stretched blow-molded and that obtain is carried out The thin-walled of container, lightweight are also limited, thus cannot realize enough costs and reduce.

The present inventor etc. propose in patent documentation 1 band bottom tube-like container manufacture method and, The scheme of the products formed in advance of the tabular being suitable for use in this manufacture method, wherein, at the bottom of described band The manufacture method of cylindrical container is suitable for: relatively thin lighter band bottom tube-like container is carried out biaxial stretch-formed blowing Molded make preform.

Citation

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2010-188711 publication

Here, as containers such as milk product, have the container of the most small-sized thin-walled light weight so Demand.Such as, there is the demand of the band bottom tube-like container of the extremely light weight of below 5g.Thus, this It is accomplished by using the preform of the more tabular that thin-walled light weight is small-sized, band bottom tube-like container is carried out double Axle is stretch blow-molded.

But, once the preform of tabular is made thin-walled, because preformation can be easily damaged in heating Self conformality of type body.Thus, it is suitable for Biaxially stretched blow-molded temperature being heated to Moment, it is possible to be unable to maintain that thermal deformation occurs in original shape, thus hinder Biaxially stretched blow Molding.

It addition, the central part of the tabular preform in the part becoming band bottom tube-like container bottom side Point, its stretching ratio is more than the part of outer circumferential side, accordingly, it would be desirable to make its wall thickness be thicker than the portion of outer circumferential side Point.In the case of the preform being manufactured tabular by injection mo(u)lding, it is usually, injection mo(u)lding Injection hole be positioned at: the middle body of the cavity of the preform molding of tabular that is tabular pre- The position that the part that the wall thickness of molded body is the thickest is formed.Its result, in the injection mo(u)lding of preform Time, the central part wall thickness partial volume of injection hole present position is the most overheated and crystallization, thus in albefaction shape State.Its result, the drawback such as shaping characteristic degeneration that can produce central part wall thickness part.

Point in view of the above-mentioned problems, the problem of the present invention is to provide one: be suitable for manufacturing small-sized thin The preform of the shape of the band bottom tube-like container of wall light weight and, be suitable for this preform is entered Row heating also sends into the heating means of preform of blow molding mould.It addition, the problem of the present invention Also reside in offer one: implement Biaxially stretched blow-molded to this preform, manufacture cartridge type at the bottom of band The manufacture method of the band bottom tube-like container of container.

In order to solve the problems referred to above, the heating means of the preform of the present invention, it is in order to thermoplastic Property resinous preform implement Biaxially stretched blow-molded to manufacture at the bottom of the band with mouth flange Cylindrical container, is heated to described preform to carry out described Biaxially stretched blow-molded molding Temperature, and the described preform after heating is fed through in blow molding mould, it is characterised in that

Described preform has: is carried out described Biaxially stretched blow-molded and becomes cylinder at the bottom of described band The plate-like main body of container body portion at the bottom of the band of shape container and be not carried out described Biaxially stretched blow Molding and be directly becoming the edge flange of described mouth flange；

Heater is made to be contacted with at least of surface of described plate-like main body of described preform Point, this plate-like main body is carried out contact heating and makes up to described forming temperature.

In the method for the invention, the preform making heater contact tabular heats.Make In the case of the wall thickness of preform is relatively thin, at the central part of the preform softened because of heating Grade place, it is possible to produce the thermal deformation of flexural deformation etc. downwards.Because have employed contact heating, Employ infrared heater etc. with the heating means of common preform that is utilization and obtain Radiant heat carries out the situation of noncontact heating and compares, and just can heat preforming efficiently with the short time Body.It addition, by making heater suitably contact preform, be possible to prevent or suppress thermal deformation. Therefore, will not be with occurring: hinder Biaxially stretched blow-molded thermal deformation, such that it is able to will heating After tabular preform send into blow molding mould.Thus, as preform, with conventional phase Ratio, it is possible to use the more light weight of thin-walled, it is as a result, it is possible to realize being become by Biaxially stretched blow Type and the thin-walled/lightweight of band bottom tube-like container that obtains and significantly cost reduce.

Further, since products formed is the products formed in advance of tabular in advance, therefore, it is possible to pass through injection mo(u)lding The most much less manufacture is, it is also possible to manufactured by compression forming.Further, since shape is The most simple, therefore, it can reduce the manufacturing cost of products formed mould in advance, such that it is able to Use the various thermoplastic resin such as PP, PE, PEN, PS beyond PET, easily make Make.Additionally, because being the products formed in advance of tabular, same resin or xenogenesis tree therefore can also be utilized Fat easily carries out stacking molding, between each resin bed, can easily sandwich film, thin film, Additionally, can also easily sandwich the merit with thermostability, oxygen-barrier property etc. between each resin bed Can property material.

In the present invention, as described heater, it is possible to use have the heater in heating face, this The shape of hot side and the side surface complementarity of described plate-like main body, make the described heating of described heater Face is in close contact the described surface in described plate-like main body, maintains this close contact state, and one While described plate-like main body to be carried out contact heating, make up to described forming temperature.In this case, Heated by contact, it is also possible to the described surface of described plate-like main body is carried out pasteurization.

By the heating face of heater is made the heating target part with preform that is with tabular master The shape of the surface shape complementary of body, can make heating face be in close contact the table in plate-like main body Face.Accordingly, plate-like main body can be heated efficiently.Further, since plate-like main body is in close contact In heating face, therefore, by heating face, can be reliably prevented or suppress thermal deformation.Additionally, have Time by when the heating face of making is in close contact in the surface of plate-like main body heat, it is also possible to right This surface carries out pasteurization, such that it is able to omit the plate-like main body table carried out as subsequent handling The sterilization process in face or the sterilization process of vessel surface obtained.

In this case, it is preferably, in order to the heating face of being reliably formed and the table of plate-like main body Close contact state between face, by pressing or by vacuum attraction, makes described heating face from downside Or upside is in close contact the described surface in described plate-like main body, and supported by described heating face Described plate-like main body, maintains this close contact state, while adjoint thermal deformation will not occur Mode described plate-like main body is carried out contact heating, be allowed to described forming temperature.

It addition, as described heater, it is possible to use have the 1st heating face the 1st heater, with And there is the 2nd heater in the 2nd heating face, the shape in wherein said 1st heating face with become described 1st surface complementarity of the side of the described plate-like main body of container body portion medial surface, described 2nd The opposite side of the shape of hot side and the described plate-like main body becoming described container body portion lateral surface 2nd surface complementarity.In this case, by described plate-like main body being clipped in the described 1st, the 2nd Between heating face, and make described 1st heating face be in close contact in described 1st surface, make the described 2nd Heating face is in close contact in described 2nd surface, maintains this close contact state, while with will not With occurring that the mode of thermal deformation carries out contact heating to described plate-like main body, make up to described Forming temperature.Furthermore it is possible to described 1st, the 2nd surface of described plate-like main body is heated Sterilization.

Then, in the preform of the present invention, can be by the central axis of this preform Position become the concave curved surface in deep and the extend laterally the 1st from the outer peripheral edge of this concave curved surface Plane, specifies described 1st surface of the described plate-like main body of this preform, in described Position on mandrel line becomes the convex surface at top, specifies described 2nd table of described plate-like main body Face.

In the case of manufacturing preform by injection mo(u)lding, can reduce and injection forming mold The thickness of the part becoming thickest of the opposed preform of injection hole, such that it is able to prevent pre- The middle body of molded body produces because of drawbacks such as the performance degradations caused by albefaction.

In this case, about the thickness of slab of described plate-like main body, can make by described 1st plane The thickness of slab of the part being prescribed with the described convex surface outer peripheral edge portion from flange side, described edge Gradually increase towards described center, and be prescribed by described concave curved surface and described convex surface Middle body then can maintain the most certain thickness.Such as, by there is center at same position Arc surface come regulation concave curved surface and convex surface, so that the middle body of plate-like main body is Certain wall thickness.

It addition, as band bottom tube-like container, it is commonly known that there is such a container: in its mouth flange And between container body portion, it is accompanied with the container of the shape of the little constriction of diameter container main part. Can the preform of following shape be implemented Biaxially stretched blow-molded, manufacture this shape Container.

That is, described preform has: from the inner peripheral of described edge flange towards described 2nd table Face curving and the constriction that is connected with the outer peripheral edge of described plate-like main body.

In the present invention, preformation can be transported along the scheduled circuit towards blow molding mould Type body, carries out the heating of preform.To this end,

By described preform placing in the conveyance utensil of frame-like, the carrier of wherein said frame-like There is the flange support face of the described edge flange of preform described in placing,

In this condition, along predetermined circuit, conveyance utensil is transported to heater contact position,

At described heater contact position, described heater is made to be contacted with placing on described conveyance utensil The described plate-like main body of described preform,

Along predetermined circuit, the described heater of described preform and described carrier will be contacted with Tool is transported to heater disengaging configuration together,

At described heater disengaging configuration, described heater is made to depart from from described preform,

Then, by described conveyance utensil, described preform is sent in described blow molding mould ?.

Then, at the bottom of the band of the present invention, the manufacture method of container is characterised by, will use above-mentioned heating side Method and heated after described preform send into Biaxially stretched blow-molded blow molding mould In, and close described blow molding mould, clamp described conveyance utensil and described preform Under the state of described edge flange, the described plate-like main body of described preform is implemented biaxial stretch-formed Blow molding.

It addition, the present invention is: after using above-mentioned heating means to be heated, be fed to twin shaft and draw Stretching the preform manufacturing band bottom tube-like container in the blow molding mould of blowing, its feature exists In,

Have: be carried out Biaxially stretched blow-molded and become container at the bottom of the band of described band bottom tube-like container The plate-like main body of main part and be not carried out described Biaxially stretched blow-molded and be directly becoming institute State the edge flange of the mouth flange of band bottom tube-like container,

Described plate-like main body has: become the side of described container body portion medial surface the 1st surface, And become the 2nd surface of the opposite side of described container body portion lateral surface,

By the position on the central axis of described plate-like main body become deep concave curved surface, with And from the outer peripheral edge of this concave curved surface towards the 1st plane of outer expandable, specify described plate-like main body Described 1st surface,

Become the convex surface at top by the position on described central axis, specify described plate-like body Described 2nd surface in portion.

Here, about the thickness of slab of described plate-like main body, can make by described 1st plane and described Convex surface and the thickness of slab of part that the is prescribed outer peripheral edge portion from flange side, described edge are towards institute Center of stating gradually increases, and the middle body being prescribed by described concave curved surface and described convex surface Thickness of slab then can be maintained at certain thickness.

It addition, described preform can also have: from the inner peripheral of flat described edge flange The narrowed portion being connected with the outer peripheral edge of described plate-like main body towards described 2nd surface curving Point.

Accompanying drawing explanation

Fig. 1 (a) is the half section side view of the example representing band bottom tube-like container, and (b) is to represent It is used in the sectional view of the preform manufacturing band bottom tube-like container.

Fig. 2 (a), (b), (c) and (d) is to represent to be used in enforcement Biaxially stretched blow Molding manufactures the top view of an example of the preform of the tabular of the band bottom tube-like container of Fig. 1, looks up Figure, front view and sectional view.

(a), (b), (c) and (d) of Fig. 3 A be represent be used in enforcement biaxial stretch-formed Blow molding manufactures the vertical view of an other example of the preform of the tabular of the band bottom tube-like container of Fig. 1 Figure, upward view, front view and sectional view.

(a), (b), (c) and (d) of Fig. 3 B be represent be used in enforcement biaxial stretch-formed Blow molding manufactures the vertical view of an other example of the preform of the tabular of the band bottom tube-like container of Fig. 1 Figure, upward view, front view and sectional view.

(a), (b), (c) and (d) of Fig. 3 C be represent be used in enforcement biaxial stretch-formed Blow molding manufactures the vertical view of an other example of the preform of the tabular of the band bottom tube-like container of Fig. 1 Figure, upward view, front view and sectional view.

Fig. 4 is to represent heat the preform of Fig. 2 and send into blow molding mould for illustrating In preform heating transport method and to preform implement Biaxially stretched blow-molded come Manufacture the simulation drawing of the manufacture method of container at the bottom of band.

Fig. 5 is the schematic diagram of the contact heating of the preform representing the blow molding apparatus in Fig. 4.

Fig. 6 is the top view of the configuration example representing the blow molding apparatus being suitable for the present invention.

Fig. 7 is heating station and the elevator of downside heater representing the blow molding apparatus in Fig. 6 The schematic diagram of one example of structure.

Detailed description of the invention

Below, referring to the drawings, illustrate band bottom tube-like container involved by embodiments of the present invention (with Under be only simply termed as " container at the bottom of band "), the preform (hereinafter referred to as " molding in advance of tabular Product ") and band at the bottom of the manufacture method of container.

(container at the bottom of band)

Fig. 1 (a) is the half section side view of the example representing band bottom tube-like container, and Fig. 1 (b) is table Show the sectional view being used in the preform manufacturing band bottom tube-like container.Band involved by present embodiment End container 1 is the such as weight small containers in the thin-walled light weight of below 5g, and it has cylindrical shape The container body portion 2 at the bottom of band, surround the container finish 3 of the upper end open edge of this container body portion 2.Hold Device main part 2 is to be carried out Biaxially stretched blow-molded stretched portion, and container finish 3 is not to be carried out Biaxially stretched blow-molded non-stretching part.

Container body portion 2 presents its outside dimension the most flat drum more than height dimension. Container finish 3 has in the present example: that extend up in the side orthogonal with container center axis 1a and There is one fixed width and certain thickness flat mouth flange 4 and from this mouth flange 4 Inner peripheral bend towards the direction of container center axis 1a and with the upper edge part of container body portion 2 even The most small-bore oral area constriction 5 connect.

Fig. 2 is to represent to be used in manufacture the tabular of container 1 at the bottom of band by Biaxially stretched blow-molded Preform, (a) be top view, (b) be look up figure, (c) be front view, (d) be to cut Face figure.With reference to Fig. 1 (b) and Fig. 2, the shape of products formed 10 in advance is described.

Products formed 10 has in advance: the plate-like main body 12 that is made up of thermoplastic resins such as PET, with And be connected with the outer peripheral edge portion of plate-like main body 12 and be formed as surrounding the state of this outer peripheral edge portion Edge 13.Plate-like main body 12 is to be carried out Biaxially stretched blow-molded and become container 1 at the bottom of band The stretched portion of container body portion 2, edge 13 be not carried out Biaxially stretched blow-molded and direct The non-stretching part retained as the container finish 3 of container at the bottom of band 1.Therefore, edge 13 presents With container finish 3 same shape of container at the bottom of band 1, it has: the circle corresponding with mouth flange 4 Ring-type edge flange 14 and the circular edge constriction corresponding with oral area constriction 5 15。

A side surface of the plate-like main body 12 of products formed 10 that is the 1st surface 16 of upside are in advance: Become the surface portion of the inner surface 6 of the container body portion 2 of container 1 at the bottom of band；Opposite side that is under 2nd surface 17 of side is: become the surface portion of the outer surface 7 of container body portion 2 at the bottom of band.

1st surface 16 of plate-like main body 12 is by becoming deep on mandrel line 11 wherein Concave curved surface 16a and from the outer peripheral edge of this concave curved surface 16a towards the 1st plane 16b of outer expandable It is prescribed.1st plane 16b is the plane extended up in the side orthogonal with central axis 10a. To this, the 2nd surface 17 of the opposition side of plate-like main body 12 is then by mandrel line 11 wherein On become what the convex surface 17a at top was prescribed.

Accordingly, among the wall thickness of plate-like main body 12 by the 1st plane 16b and convex surface 17a And the part being prescribed gradually increases towards central axis 11 from side, edge 13.Pass through Concave curved surface 16a and the core of convex surface 17a and the middle body of plate-like main body 12 that is prescribed It is then almost to be maintained at certain thickness.This part is the part of the thickest of products formed 10 in advance. Such as, the part of thickest is set at the thickness of about below 6mm.

Manufactured by injection mo(u)lding in advance in the case of products formed 10, be usually, for this In advance in the cavity of the injection forming mold that products formed 10 is shaped, injection hole is positioned at and plate-like body The position that the center in portion 12 is corresponding.In the case of the present example, injection hole is positioned at by molding in advance The convex surface 17a of product 10 and the top at the center on the 2nd surface 17 that is prescribed.Utilize concave curved surface 16a, Middle body on the 1st surface 16 of the opposition side of products formed 10 in advance forms out depression, reduces Wall thickness from the part of injection hole resin by injection.By suitably setting by determined by concave curved surface 16a Depression, when injection mo(u)lding, the thickest part of the middle body of products formed 10 will not be excessive in advance Crystallization and present albefaction.

It addition, (a), (b), (c) and (d) of Fig. 3 A is that products formed is additionally in advance The top view of one example, upward view, front view and sectional view.Products formed 10A in advance shown in these figures It is: be parallel to the direction orthogonal with central axis 11 by the two sides of its plate-like main body 12A The plane of upper extension, is prescribed, and this plate-like main body 12A becomes certain thickness plate on the whole Part.

(a), (b), (c) and (d) of Fig. 3 B is another that represent products formed in advance Top view, upward view, front view and the sectional view of an other example.Molding in advance shown in these figures Product 10B is formed as: made the edge 13 of products formed 10 in advance only by flat edge flange shape The edge 13B become.

(a), (b), (c) and (d) of Fig. 3 C is represent products formed in advance other one The top view of example, upward view, front view and sectional view.Products formed 10C in advance shown in these figures Be formed as: except the periphery of the plate-like main body 12B of the 10B of products formed in advance shown in Fig. 3 (B) Beyond edge portion, this plate-like main body 12B is made certain thickness, be then court in outer peripheral edge portion To edge 13C, thickness reduces gradually.It addition, although the products formed in advance of diagram is circular contour, However, it can be the various non-circular profiles such as ellipticity profile, polygonal profile.Right according to manufacturing The barrel shape of container etc. at the bottom of the band of elephant and use the products formed in advance of various contour shape.

(manufacture method of container at the bottom of the heating means of products formed and band in advance)

Fig. 4 is to represent the heating means of products formed in advance and manufacture the manufacture method of container 1 at the bottom of band The simulation drawing of one example, the heating means of wherein said products formed in advance are: conveyance tabular is in advance Products formed 10 is while heating and being heated to be suitable for Biaxially stretched blow-molded temperature and be fed through blowing The heating means of the products formed in advance in mould；At the bottom of described manufacture band, the manufacture method of container 1 is: It is heated to be suitable for the products formed in advance of the temperature of molding for by these heating means, implements Biaxially stretched blow-molded thus manufacture the manufacture method of container 1 at the bottom of band.

In the heating means of products formed in advance, transport products formed 10 in advance along carrying channel 21 While being heated by contact and being heated to be suitable for Biaxially stretched blow-molded temperature, and send into blowing Mould 22.Carrying channel 21 is: such as, makes circular products formed in advance carry with a determining deviation The recycle circuit that body 23 (conveyance utensil) circulates.Products formed 10 supplies position at products formed in advance in advance Put 24, the carrier of products formed in advance 23 being externally supplied on carrying channel 21.Products formed 10 in advance Carried by products formed carrier 23 in advance towards upper state with its 2nd surface 17.

The carrier of products formed in advance 23 carrying products formed 10 in advance is transported along carrying channel 21, logical During crossing the heating part of products formed in advance 25 being arranged in its way, touched it be heated to be suitable for twin shaft and draw Stretch the temperature (Fig. 5 with reference to described below) of blow molding.

The position in the downstream of the conveyance direction of the heating part of products formed in advance 25 on carrying channel 21, It is configured with blow molding mould 22.In blow molding mould 22, carry heated to become in advance The carrier of products formed in advance 23 of type product 10, is fed to the blow molding mould under mould open mode In 22.Once sending into products formed carrier 23 in advance, blow molding mould 22 is then closed, in advance First products formed 10 is implemented Biaxially stretched blow-molded, obtains container 1 at the bottom of band.

At the bottom of band, container 1 is after blow molding mould 22 is sent, the container on carrying channel 21 Reclaim position 26, depart from from products formed carrier 23 in advance and be recycled to predetermined place.Empty is pre- First products formed carrier 23 again returns to the position of products formed supply in advance along products formed carrying channel 21 in advance Put 24.

Fig. 5 (a), (b) are to represent to utilize the molding in advance being arranged in products formed heating part 25 in advance The heater of product heating carries out the contact of products formed in advance and adds thermally operated schematic diagram.

First, as shown in Fig. 5 (a), products formed carrier 23 is in toroidal in advance, and it is circular The part of inner peripheral side of upper surface 23a become the circular flange support face of the step that falls 23b.Products formed 10 is in products formed supply position 24 in advance in advance, at the edge flange of its edge 13 14 by placing on the 23b of flange support face, be carried in advance on products formed carrier 23, And transported along carrying channel 21.

In this case, products formed carrier 23 is transported to sending out of products formed heating part 25 in advance in advance Hot body contact position 25a (with reference to Fig. 4).Upside heating it is configured with in products formed heating part 25 in advance Body 31, downside heater 32.As shown in Fig. 5 (a), upside heater 31, downside heater 32 Standby at the upper-lower position of carrying channel 21.

Such as, from the moment of the front being in heater contact position 25a, with molding in advance Product carrier 23 synchronously moves along carrying channel 21, makes upside heater 31, downside send out Hot body 32 declines and rises.Accordingly, as shown in Fig. 5 (b), at heater contact position 25a, Formed: by upside heater 31, downside heater 32 from up and down to being carried on products formed carrier in advance Products formed in advance 10 on 23 carries out the state held.

At upside heater 31, downside heater 32 from being in close contact up and down, edge Carrying channel 21 and transport products formed 10 in advance.Accordingly, products formed 10 is touched in advance is heated to fit Together in Biaxially stretched blow-molded temperature.Products formed carrier 23 once arrives heater disengaging position in advance Putting 25b (with reference to Fig. 4), upside heater 31, downside heater 32 move back in the vertical direction Keep away.Upside heater 31, downside heater 32 after keeping out of the way up and down again return to carrying channel 21 Heater contact position 25a side.From heater contact position 25a to heater disengaging configuration Between 25b, make upside heater 31, downside heater 32 and the products formed carrier 23 in advance organized more Synchronously it is circulated, thus can continually or intermittently carry out the contact heating of products formed 10 in advance Action.

Here, the upside heater 31 of products formed heating part 25 has in advance: in products formed in advance Heating face, the upside 31a of the concave curve surface shape of the 2nd surface 17 complementation of 10.Similarly, downside heating Body 32 has: generate heat in the downside with the surface configuration of the 1st surface 16 complementation of products formed 10 in advance Face 32a.Specifically, heating face, downside 32a has: with the concave curved surface 16a phase on the 1st surface 16 Corresponding convex surface part 32b and the plane corresponding with the 1st plane 16b on the 1st surface 16 Part 32c.

Therefore, on the upside of using in the contact heating process of heater 31, downside heater 32, pin For the both side surface of products formed 10 in advance, heating face, upside 31a, heating face, downside 32a become tight Close contact condition.Therefore, it can carry out contact heating efficiently, just can will become in advance with the short time Type product 10 are heated to be suitable for Biaxially stretched blow-molded temperature.That is, sending into blow molded die Tool 22 implements the Biaxially stretched blow-molded moment, products formed 10 in advance can be heated, To obtain and being best suited for this Biaxially stretched blow-molded state of temperature.Such as, products formed 10 in advance It is heated to 70～120 DEG C.

During contact heating, by heating face, upside 31a, heating face, downside 32a, carry out handle from both sides Holding the plate-like main body 12 of products formed 10 in advance, therefore, it can will not be with thermal deformation occur right The plate-like main body 12 of thin-walled heats.

It addition, because touched heating under close contact state, therefore, it can for molding in advance Pasteurization is simultaneously implemented in the two sides of product 10.Such as, will be heated to make a reservation for by products formed 10 in advance Temperature, and it is heated state maintenance certain time, such that it is able to reliably to products formed 10 in advance Surface carry out pasteurization.

It addition, in this example, heater 31, downside heater 32 on the upside of use, to products formed in advance 10 carry out contact heating.For example, it is also possible to heater 31 on the upside of only using, from upside (from the 2nd Side, surface 17) products formed 10 in advance is heated.

It addition, such as, as shown in Fig. 5 (a) chain lines, in heating face, upside, 31a is formed multiple Airport 31d, in contact heated condition, can carry out vacuum attraction to products formed 10 in advance While heating.Accordingly, the thermal deformation of the products formed in advance 10 of thin-walled it is possible to prevent.Can also be After heating terminates, airport 31d is switched to pressurized state, makes products formed 10 in advance leave upside Heating face 31a.

On the contrary, it is also possible to heater 32 on the downside of only using, add from downside to products formed 10 in advance Heat.Even in this case, as shown in dot-dash in Fig. 5 (a), it is also possible at heating face, downside 32a Formed airport 32d, can reliably with under the 32a close contact state of heating face, downside to contacting Add the products formed in advance 10 hankered to be supported.

Alternatively, it is also possible to this airport 31d, 32d are arranged on the heating face, upside shown in Fig. 5 On the both sides of 31a and heating face, downside 32a.

(the concrete composition of blow molding apparatus)

Fig. 6 is the top view of the concrete configuration example representing blow molding apparatus, wherein blow molding apparatus It is for the products formed in advance 10 of above-mentioned composition is implemented Biaxially stretched blow-molded, thus manufactures band End container 1.Blow molding apparatus 40 has the supply station 41 being externally supplied products formed 10 in advance. Standby at supply station 41 for carrying the circular carrier 42 transporting products formed 10 in advance.Carrier 42 is identical with the composition of the carrier of products formed in advance 23 shown in Fig. 5.

At supply station 41, such as there are 4 carriers 42 standby simultaneously.As it is shown in figure 5, each carrier 42 Carry products formed 10 in advance.

Carry the carrier 42 of products formed 10 in advance to be moved along the carrying channel of linearity that is supply road 43 Send, and be handed over to heating station 44.At heating station 44, such as, plate is horizontally rotated discoid The circular outer circumference of 45, is formed with a determining deviation on its circumferencial direction and is made up of semicircular recess Carrier conveyance groove 45a.The carrier 42 being installed on each carrier conveyance groove 45a turns along with level Move the rotation of plate 45 and transported along circular carrying channel 46.

In carrying channel 46, with the downstream on the supply road 43 of the linearity extended out from supply station 41 The position that end is reported to the leadship after accomplishing a task mutually is that products formed puts into position 47 in advance.Position 47 is put at products formed in advance Side is configured with input pocket-wheel 48.Along with the input rotation of pocket-wheel 48, it is formed at it The transfer recess 48a of outer peripheral face accepts carrier 42 from supply road 43, and transfers carrier 42 to position Products formed in advance on circular carrying channel 46 puts into the carrier conveyance groove 45a at position 47.

Put into position 47 from products formed in advance and put into carrier 42 warp successively the carrying channel 46 of circle By the heater contact position 49 in conveyance road and heater disengaging configuration 50, until in advance Products formed launching position 51.The products formed in advance 10 being carried on carrier 42 is contacting position from heater Put 49 conveyances to period of heater disengaging configuration 50, from held up and down upside heater 31, Downside, between heating face, the upside 31a of heater 32, heating face, downside 32a, presents tight with them The state of contact.In this condition, products formed 10 touched heating from both sides in advance (reference Fig. 5).

It is configured with to send on the side of the launching position of products formed in advance 51 of circular carrying channel 46 and uses star Shape wheel 52.Using pocket-wheel 52 by sending, the carrier 42 that carry products formed 10 in advance becomes from advance Type product launching position 51 is via the carrying channel of linearity that is sends road 53 and is sent to spacing conversion Mechanism 54.Spacing mapping device 54 has: to from sending the carrier 42 sent out on road 53 to send The 4 stripe pitch conversion arms 55 that the constant state of spacing is accepted.4 stripe pitch convert each of arms 55 Bar once receives carrier 42, and this 4 stripe pitch conversion arm 55 then expands spacing along directly The conveyance circuit 56 of wire moves, and expands to be suitable for Biaxially stretched blow-molded spacing.At this Under state, 42 4 four ground of carrier are handed over to blow molding station 57.

Blow molding station 57 is 4 websites extracted, and its blow molding mould 58 has along directly 4 molding cavity 58a that the carrying channel 59 of wire is formed with a determining deviation.By being positioned at each cavity The products formed in advance 10 that each carrier 42 of 58a is carried is carried out biaxial stretch-formed blowing after mould matched moulds Molded, thus become container 1 at the bottom of band.After opening mould in Biaxially stretched blow-molded end, Carry 4 carriers 42 of container 1 at the bottom of band from blow molding station 57 along the carrying channel 59 of linearity It is discharged, and is sent to product discharge station 60.

It is configured with in product discharge station 60: container 1 at the bottom of by band extracts upward from carrier 42 and makes Reversion, the Product recycling mechanism 62 being expelled in the product discharge path 61 of linearity with front position. Product recycling mechanism 62 has 4 arm 62a, presss from both sides 62b by the switch in these arm fronts and holds respectively The container finish 3 of container 1 at the bottom of band.Then, around horizontal rotating shaft 62c and revolve in the vertical direction Turn, container at the bottom of band 1 is expelled to be positioned at the product discharge path 61 of position, opposition side.Container 1 edge at the bottom of band Product discharge path 61 and be discharged to discharge side, and be recycled to predetermined place.

Empty carrier 42 after being recovered about container at the bottom of band 1, every 4 carriers 42 pass through level Turntable 63 rotates 180 degree, is supplied to the carrier supply road 64 of linearity.It is supplied to carrier The carrier 42 on supply road 64, by carrier delivering mechanism 65, is sent along carrier supply road 64, And it is supplied to products formed supply station 41 in advance.It is supplied to the sky of products formed supply station 41 in advance Carrier 42 is the most standby, waits the supply of products formed 10 in advance.

Fig. 7 (a) be represent from heating station 44 take out approximate vertical view, Fig. 7 (b) be represent under The schematic diagram of the elevating mechanism of side heater 32.

At heating station 44, in the outer peripheral edge horizontally rotating plate 45, the most at certain intervals It is formed: transport the carrier conveyance groove 45a of carrier 42 along circular carrying channel 46.At each carrier Conveyance groove 45a is each configured with upside heater 31 and downside heater 32 (not shown) up and down. These heaters 31,32 are integral with horizontally rotating plate 45 by heater rotating mechanism 70, and Rotate around vertical center line 45b.Therefore, each heater 31,32 edge, ground together with each carrier 42 The carrying channel 46 circle moves.

Make the heater elevating mechanism 80 that downside heater 32 lifts on the direction of central axis 45b From the beginning of the front of the heater contact position 49 on circular carrying channel 46, make downside heater 32 Rise from position of readiness.At heater contact position 49, the heating face 32a of making is in close contact in being carried on The plate-like main body 12 of the products formed in advance 10 on carrier 42.On the downside of maintenance, heater 32 is in Rise position state, that is, maintain contact heated condition, until heater disengaging configuration 50 with Front conveyance position.Then, along with the conveyance of carrier 42, make downside heater 32 decline, Heater disengaging configuration 50, make downside heater 32 leave in advance products formed 10 and keep out of the way downward, Again return to position of readiness.

As heater elevating mechanism 80, such as, as shown in Fig. 7 (b), can be by cam mechanism 90 and heater rotating mechanism 70 constitute.Cam mechanism 90 possesses: have along carrying channel 46 Formed cam surface 91 cam part 92 and by along cam surface 91 slip in the way of be installed on The cam followers 93 such as the roller of each downside heater 32.

In this case, it is preferably, has: make cam part 92 to horizontally rotate the vertical of plate 45 The rotating mechanism 94 rotated is carried out centered by rotary shaft 45b.Cam part 92 is once made to rotate predetermined Angle, can make the heating on the carrying channel 46 that the cam surface 91 by this cam part 92 is prescribed Body contact position 49 and heater disengaging configuration 50 are towards the upstream side of carrying channel 46 or downstream Position is moved.

Although it addition, Fig. 7 (b) illustrates the elevating mechanism 80 of downside heater 32, but upside is sent out The elevating mechanism of hot body 31 can also similarly be constituted.

Symbol description

Container 1a container center axis at the bottom of 1 band

2 container body portion 3 container finishs

4 mouth flange 5 oral area constriction

6 inner surface 7 outer surfaces

10 products formed 11 central axis in advance

12 plate-like main body 13 edges

14 edge flange 15 edge constriction

16 the 1st surface 16a concave curved surfaces

16b the 1st plane 17 the 2nd surface

17a convex surface 21 products formed carrying channel in advance

22 blow molding mould 23 products formed carriers in advance

23a upper surface 23b flange support face

24 products formed heating parts in advance, products formed supply position 25 in advance

25a heater contact position 25b heater disengaging configuration

Generate heat on the upside of heater 31a on the upside of in the of 31 face

Heater on the downside of 31d airport 32

Heating face 32b convex surface part on the downside of 32a

32c planar section 32d airport

Claims (14)

1. heating means for preform, for for the preform reality to thermoplastic resin Execute the Biaxially stretched blow-molded band bottom tube-like container manufacturing and there is mouth flange, thus by described pre- Molded body is heated to carry out described Biaxially stretched blow-molded forming temperature, it is characterised in that

Described preform has: is carried out described Biaxially stretched blow-molded and becomes cylinder at the bottom of described band The plate-like main body of container body portion at the bottom of the band of shape container and be not carried out described Biaxially stretched blow Molding and be directly becoming the edge flange of described mouth flange；

Heater is made to be contacted with at least of surface of described plate-like main body of described preform Point, this plate-like main body is carried out contact heating and makes up to described forming temperature.

The heating means of preform the most according to claim 1, it is characterised in that

As described heater, using the heater with heating face, the shape in this heating face is with described The side surface complementarity of plate-like main body,

The described heating face making described heater is in close contact the described surface in described plate-like main body,

While maintaining this close contact state, described plate-like main body being carried out contact heating, makes Reach described forming temperature.

The heating means of preform the most according to claim 2, it is characterised in that

By carrying out contact heating, the described surface of described plate-like main body is carried out pasteurization.

The heating means of preform the most according to claim 2, it is characterised in that

By pressing or by vacuum attraction, described heating face is made to be in close contact in institute from downside or upside State the described surface of plate-like main body, and support described plate-like main body by described heating face,

While maintaining this close contact state, will not come institute with in the way of thermal deformation occurs State plate-like main body and carry out contact heating, make up to described forming temperature.

The heating means of preform the most according to claim 1, it is characterised in that

As described heater, use and there is the 1st heater in the 1st heating face and have the 2nd 2nd heater in heating face, wherein said 1st heating face shape with become described container body portion 1st surface complementarity of the side of the described plate-like main body of medial surface, the shape in described 2nd heating face Mutual with the 2nd surface of the opposite side of the described plate-like main body becoming described container body portion lateral surface Mend,

By being clipped between described 1st and the 2nd heating face by described plate-like main body, and make described 1 heating face is in close contact in described 1st surface, makes described 2nd heating face be in close contact in the described 2nd Surface,

While maintaining this close contact state, will not come institute with in the way of thermal deformation occurs State plate-like main body and carry out contact heating, make up to described forming temperature.

The heating means of preform the most according to claim 5, it is characterised in that

By carrying out contact heating, described 1st, the 2nd surface of described plate-like main body is added Thermal sterilization.

7. according to the heating means of the preform described in claim 1 to 6 any one, its feature It is,

One side surface of the described plate-like main body of described preform is to become in described container body portion 1st surface of side, opposite side surface is the 2nd surface becoming described container body portion lateral surface,

The concave curved surface in deep, Yi Jicong is become by the position on the central axis of this preform The outer peripheral edge of this concave curved surface, towards the 1st plane of outer expandable, specifies the institute of described plate-like main body State the 1st surface,

Become the convex surface at top by the position on described central axis, specify described tabular master Described 2nd surface of body.

The heating means of preform the most according to claim 7, it is characterised in that

About the thickness of slab of described plate-like main body,

The thickness of slab of the part being prescribed by described 1st plane and described convex surface is convex from described edge The outer peripheral edge portion of edge side gradually increases towards described central axis,

The thickness of slab of the middle body being prescribed by described concave curved surface and described convex surface is maintained at one Fixed maximum gauge.

9. according to the heating means of the preform described in claim 7 or 8, it is characterised in that

Described preform has: from the inner peripheral of described edge flange towards described 2nd side, surface The constriction bent and be connected with the outer peripheral edge of described plate-like main body,

Described constriction is: is not carried out described Biaxially stretched blow-molded and is directly becoming with described The part of the container narrowed portion that the described mouth flange with bottom tube-like container connects.

10. according to the heating means of the preform described in claim 1 to 9 any one, its feature It is,

By described preform placing in the conveyance utensil of frame-like, the carrier of wherein said frame-like There is the flange support face of the described edge flange of preform described in placing,

In this condition, along predetermined circuit, conveyance utensil is transported to heater contact position,

At described heater contact position, described heater is made to be contacted with placing on described conveyance utensil The described plate-like main body of described preform,

Along predetermined circuit, the described heater of described preform and described carrier will be contacted with Tool is transported to heater disengaging configuration together,

At described heater disengaging configuration, described heater is made to depart from from described preform.

The manufacture method of 11. 1 kinds of band bottom tube-like containers, it is characterised in that

The heating means of use preform described in claim 10, send into double by described preform In the blow molding mould of axle stretch-blow,

Close described blow molding mould, clamp described conveyance utensil and the institute of described preform Under the state stating edge flange, the described plate-like main body of described preform is implemented biaxial stretch-formed blowing Mould.

12. 1 kinds of preforms manufacturing band bottom tube-like container, it is used for claim 1 institute The heating means stated manufacture the band bottom tube-like container with mouth flange, and this band bottom tube-like container is with quilt Be heated to can be Biaxially stretched blow-molded temperature state and be supplied to Biaxially stretched blow use Blow molding mould, it is characterised in that

Have: be carried out Biaxially stretched blow-molded and become container at the bottom of the band of described band bottom tube-like container The plate-like main body of main part and be not carried out described Biaxially stretched blow-molded and be directly becoming institute State the edge flange of the mouth flange of band bottom tube-like container,

One side surface of described plate-like main body is the 1st table becoming described container body portion medial surface Face, opposite side surface is the 2nd surface becoming described container body portion lateral surface,

By the position on the central axis of described plate-like main body become deep concave curved surface, with And from the outer peripheral edge of this concave curved surface towards the 1st plane of outer expandable, specify described plate-like main body Described 1st surface,

Become the convex surface at top by the position on described central axis, specify described tabular master Described 2nd surface of body.

The preform of 13. manufacture band bottom tube-like containers according to claim 12, its feature It is,

About the thickness of slab of described plate-like main body,

The thickness of slab of the part being prescribed by described 1st plane and described convex surface is convex from described edge The outer peripheral edge portion of edge side gradually increases towards described central axis,

The thickness of slab of the middle body being prescribed by described concave curved surface and described convex surface is maintained at one Fixed maximum gauge.

14. according to the preform manufacturing band bottom tube-like container described in claim 12 or 13, its It is characterised by,

Described preform has: from the inner peripheral of described edge flange towards described 2nd side, surface The constriction bent and be connected with the outer peripheral edge of described plate-like main body,

Described constriction is: is not carried out described Biaxially stretched blow-molded and is directly becoming described band The part of the container narrowed portion being connected with described mouth flange of bottom tube-like container.