JP5077463B2 - Manufacturing method of heat-resistant container with handle - Google Patents
Manufacturing method of heat-resistant container with handle Download PDFInfo
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- JP5077463B2 JP5077463B2 JP2011137891A JP2011137891A JP5077463B2 JP 5077463 B2 JP5077463 B2 JP 5077463B2 JP 2011137891 A JP2011137891 A JP 2011137891A JP 2011137891 A JP2011137891 A JP 2011137891A JP 5077463 B2 JP5077463 B2 JP 5077463B2
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Description
本発明は、お茶などの高温状態の液体を容器の変形を伴わずに充填することが出来る把手付耐熱容器の製造方法に関するものであって、より詳しくは、容器胴部の上半部の凹部に設けた把手取付用凸部より下の胴部の中心軸が、把手取付用凸部側に１．０°±０．５°傾くようにブロー成形金型をセットしてブロー成形すると共に、前記凹部における前記把手取付用凸部回りの壁面をヒートセットする工程を含む把手付耐熱容器の製造方法に関する。 The present invention relates to a method for manufacturing a heat-resistant container with a handle that can be filled with a liquid in a hot state such as tea without deformation of the container, and more specifically, a recess in the upper half of the container body. The blow molding die is set and blow-molded so that the center axis of the body part below the convex part for attaching the handle is inclined 1.0 ° ± 0.5 ° toward the convex part for attaching the handle, The present invention relates to a method for manufacturing a heat-resistant container with a handle, including a step of heat setting a wall surface around the handle mounting convex portion in the concave portion.
プラスチック容器は、お茶などの飲料、酒類、調味料などを収容する１．５Ｌ、２．０Ｌ以上の大型のものに把手があることにより使い勝手がよく広く使用されている。一方、この把手付容器は、性能面及びコスト面から、容器の材質がポリエチレンテレフタレートなどのポリエステル製であり、把手の材質がポリプロピレン製であることが多い。
把手付きプラスチック製容器の例としては、下記に示すものが知られている。
The plastic container is widely used because it has a handle in a large size of 1.5L, 2.0L or more that contains beverages such as tea, alcoholic beverages, seasonings and the like. On the other hand, the container with a handle is often made of a polyester such as polyethylene terephthalate and the handle is made of polypropylene in terms of performance and cost.
The following are known as examples of the plastic container with a handle.
特許文献１のものはリサイクル性の面から、把手の材質も容器の材質と同じポリエステル製としたものであり、上部から順次口部、肩部、胴部及び底部で構成し、この胴部の一部に凹部を設けると共にこの凹部に把手取付用凸部を設けたポリエステル製の容器と、この容器の把手取付用凸部に取り付けるポリエステル製の把手とからなり、凹部における把手取付用凸部回りの壁面と把手との間に空隙部を設けてなるものである。その結果、空隙部を設けた分、把手取付用凸部回りの壁面と把手との摩擦抵抗が減り、ブロー成形性が向上し、凹部の擦り傷、溶融傷、白化、あるいは凹部や底部の肉厚不良が解消されて、良好な把手付耐熱容器が得られる。 The thing of patent document 1 is the thing made from the same polyester as the material of a container from the recyclable surface, and it consists of a mouth part, a shoulder part, a trunk | drum, and a bottom part sequentially from the top, Consists of a polyester container with a concave part and a convex part for attaching the handle to the concave part, and a polyester handle attached to the convex part for attaching the handle of the container, around the convex part for attaching the handle in the concave part A gap portion is provided between the wall surface and the handle. As a result, the frictional resistance between the wall surface around the protrusion for mounting the handle and the handle is reduced by the amount of the gap, the blow moldability is improved, the scratch on the recess, the melted scratch, the whitening, or the thickness of the recess or the bottom. A defect is eliminated and a good heat-resistant container with a handle is obtained.
また特許文献２の把手付耐熱容器は、ポリエステル製の容器上部の胴部に別体の把手をインサート成形し、把手を取り付けた上部の胴部の横断面形状は円形に成形して、減圧吸収パネルを形成した下部の胴部の横断面形状は四角形状に成形してなり、更に、把手のアンダーカット部を包み込む胴部の壁面をヒートセットすると共に、減圧吸収パネルの面積と口部のネックリングより下の表面積との割合が０．２２以上となるようにしたことにより良好な把手付耐熱容器が得られる。 In the heat-resistant container with a handle of Patent Document 2, a separate handle is insert-molded into the upper body of the polyester container, and the cross-sectional shape of the upper body with the handle attached is formed into a circular shape. The lower cross section of the panel forming the panel is formed into a square shape, and the wall surface of the body that wraps the undercut part of the handle is heat set, and the area of the vacuum absorbing panel and the neck of the mouth By making the ratio of the surface area below the ring to be 0.22 or more, a good heat-resistant container with a handle can be obtained.
ところが、特許文献１の把手付容器は、ブロー成形性が向上し、凹部ｄや底部ｄに発生する不具合が解消されるという効果は記載されているが、実施例には、胴部断面形状が円形のものしか記載されておらず、把手付角型容器を得るための課題も解決手段も記載されていない。また、高温充填を可能にする耐熱性の付与についても何ら記載がない。 However, the container with a handle disclosed in Patent Document 1 has an effect that blow moldability is improved and problems that occur in the recess d and the bottom d are eliminated. Only a circular shape is described, and neither a problem for obtaining a square container with a handle nor a solution means is described. Moreover, there is no description about imparting heat resistance that enables high-temperature filling.
また、特許文献２の把手付耐熱容器は、把手取付位置より下の胴部は断面形状を四角形としているものの、把手を取り付けた上部の断面形状は円形であり、容積効率を向上させるためには未だ不満足である。さらに把手のアンダーカット部を包み込む胴部をヒートセットすることにより、良好な耐熱性が得られるとしているが、ヒートセットされるのは成形金型と接触する容器壁であり、把手アンダーカット部を包み込む部分は容器内部に位置するので直接にはヒートセットできず、高温充填時の収縮・変形により把手取付強度が低下する虞がある。 Further, in the heat-resistant container with a handle of Patent Document 2, the cross section of the trunk portion below the handle attachment position has a quadrangular shape, but the cross section of the upper portion to which the handle is attached is circular, so that the volume efficiency can be improved. Still unsatisfied. Furthermore, it is said that good heat resistance can be obtained by heat-setting the body part that wraps the undercut part of the handle, but what is heat-set is the container wall in contact with the mold, and the handle undercut part is Since the portion to be wrapped is located inside the container, it cannot be directly heat set, and there is a possibility that the grip mounting strength may be reduced due to shrinkage / deformation during high temperature filling.
そこで、本発明の目的は、ブロー成形性が良好であり、容器及び把手に割れ、ひび、皺、変形及び不適切な延伸による肉厚の不均衡などの不具合を生ずることを抑え、落下衝撃に対しても充分な強度を有する把手付耐熱容器の製造方法を提供することにある。 Therefore, the object of the present invention is that the blow moldability is good, the occurrence of problems such as cracks, cracks, wrinkles, deformation and imbalance in wall thickness due to improper stretching in the container and the handle is suppressed, and a drop impact is prevented. Another object of the present invention is to provide a method for manufacturing a heat-resistant container with a handle that has sufficient strength.
本発明は、上記目的を達成するために提案されたものであって、下記の構成からなることを特徴とするものである。
すなわち、本発明によれば、ポリエステル製のプリフォームをブロー成形して中空の容器にする際、別体のポリエステル製の把手を容器の胴部上部にインサート成形してなる把手付耐熱容器の製造方法において、前記胴部の上半部の凹部に設けた把手取付用凸部より下の胴部の中心軸が、前記把手取付用凸部側に１．０°±０．５°傾くようにブロー成形金型をセットしてブロー成形すると共に、前記凹部における前記把手取付用凸部回りの壁面をヒートセットする工程を含むことを特徴とする把手付耐熱容器の製造方法が提供される。
The present invention has been proposed in order to achieve the above object, and is characterized by having the following configuration.
That is, according to the present invention, when a polyester preform is blow-molded into a hollow container, a heat-resistant container with a handle is formed by insert-molding a separate polyester handle on the upper part of the container body. In the method, the central axis of the body portion below the handle mounting convex portion provided in the concave portion of the upper half portion of the body portion is inclined by 1.0 ° ± 0.5 ° toward the handle mounting convex portion side. There is provided a method for producing a heat-resistant container with a handle, comprising a step of setting a blow molding die and performing blow molding, and heat setting a wall surface around the handle mounting convex portion in the concave portion.
また、本発明によれば、前記容器の前記凹部、および前記把手取付用凸部を成形する部位のブロー成形金型の少なくとも一部に表面処理が施されてなる上記把手付耐熱容器の製造方法が提供される。 According to the present invention, there is also provided a method for manufacturing a heat-resistant container with a handle according to the present invention, wherein at least a part of a blow molding die at a portion where the concave portion of the container and the convex portion for attaching the handle are molded is subjected to surface treatment. Is provided.
また、本発明によれば、前記インサート成形において、ブロー成形金型の把手と接する可能性のある部位が断熱処理されている上記把手付耐熱容器の製造方法が提供される。 Moreover, according to this invention, in the said insert molding, the manufacturing method of the said heat-resistant container with a handle in which the site | part which may contact the handle of a blow molding die is heat-insulated is provided.
本発明の把手付耐熱容器の製造方法においては、把手取付用凸部より下の胴部の中心軸が、把手取付用凸部側に１．０°±０．５°傾くように、予め容器をブロー成形してある。把手付耐熱容器は、把手を取り付ける面が収縮しないので傾きを生じやすいが、容器を予め逆方向に傾けた状態で成形することにより、全体のバランスが取れ、容器の傾きを是正し、正常な状態とする効果がある。
また、把手取付用凸部回りの壁面をヒートセットするから、皺が寄りづらくなり、把手がぐらついたり、容易に外れるのをぼうしすることができる。さらに、把手取付用凸部、容器の凹部、及び把手取付用凸部を成形する部位のブロー成形金型の少なくとも一部に表面処理を施すことにより、表面処理した部位のポリエステル素材の流れが良くなり、逆に把手取付用凸部の下は流れづらいから、ポリエステル素材が溜まり厚くなって、最も荷重がかかる把手取付用凸部の下の強度が増す効果がある。
In the heat-resistant container manufacturing method of the present invention, the container is previously set so that the central axis of the trunk portion below the handle mounting convex portion is inclined by 1.0 ° ± 0.5 ° toward the handle mounting convex portion. Is blow molded. Heat-resistant containers with handles are prone to tilt because the surface to which the handle is attached does not shrink, but forming the container with the container tilted in the reverse direction beforehand balances the whole and corrects the tilt of the container. There is an effect of state.
In addition, since the wall surface around the handle mounting convex portion is heat set, it is difficult for the wrinkles to come close, and it is possible to prevent the handle from wobbling or coming off easily. Furthermore, by applying a surface treatment to at least a part of the blow molding mold for forming the handle mounting convex part, the container concave part, and the handle mounting convex part, the flow of the polyester material in the surface-treated part is good. On the contrary, since it is difficult to flow under the handle mounting convex portion, the polyester material accumulates and becomes thick, and there is an effect of increasing the strength under the handle mounting convex portion where the load is most applied.
以下に、図面を参照して本発明を実施するための最良の形態を説明する。 The best mode for carrying out the present invention will be described below with reference to the drawings.
図１は本発明の製造方法によって製造される把手付耐熱容器の側面図、図２は図１のＡ−Ａ線断面図、図３は同把手付耐熱容器の正面図、図４は図３のＢ−Ｂ線断面図、図５は本発明によって製造される把手付耐熱容器に用いる把手の背面図、図６は同じくその把手の側面図、図７は図６のＸ−Ｘ線断面図である。 1 is a side view of a heat-resistant container with a handle manufactured by the manufacturing method of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, FIG. 3 is a front view of the heat-resistant container with handle, and FIG. FIG. 5 is a rear view of a handle used in the heat-resistant container with a handle manufactured according to the present invention, FIG. 6 is a side view of the handle, and FIG. 7 is a sectional view taken along the line XX of FIG. It is.
以下に、本発明によって得られる把手付耐熱容器の一例を図面によって説明する。
図面において、把手付耐熱容器（以下、単に「容器」と言うことがある）１は、上部から順次口部２、肩部３、胴部４及び底部５で構成し、この胴部４の一部に凹部６を設けると共にこの凹部６に把手取付用凸部７を設けたポリエステル製の容器８と、この容器８の把手取付用凸部７に取り付けるポリエステル製の把手９とからなり、凹部６における把手取付用凸部７回りの壁面１０と把手９との間に空隙部１１を設けてなるものであり、胴部４の横断面形状はほぼ正方形であり、凹部６は胴部４の上半部１２の角部１３にあると共に、把手取付用凸部７は上半部１２の対角線Ｌ上の凹部６に位置しているものである。
Hereinafter, an example of a heat-resistant container with a handle obtained by the present invention will be described with reference to the drawings.
In the drawing, a heat-resistant container with a handle (hereinafter sometimes simply referred to as “container”) 1 is composed of a mouth portion 2, a shoulder portion 3, a trunk portion 4 and a bottom portion 5 in order from the top. The container is made of a polyester container 8 provided with a concave portion 6 and a handle mounting convex portion 7 in the concave portion 6, and a polyester handle 9 attached to the handle mounting convex portion 7 of the container 8. The gap portion 11 is provided between the wall surface 10 and the handle 9 around the convex portion 7 for attaching the handle, and the body 4 has a substantially square cross-sectional shape. The handle attachment convex portion 7 is located in the concave portion 6 on the diagonal line L of the upper half portion 12 while being at the corner portion 13 of the half portion 12.
前記容器８の口部２には、キャップを螺着脱するためのネジ２０があり、更に、その下にフランジ２１がある。この口部２は肩部３を経て胴部４に至り、この胴部４は側壁２２にて構成し、この側壁２２の下部は底部５に連なっている。 The mouth portion 2 of the container 8 has a screw 20 for screwing the cap on, and a flange 21 below the screw 20. The mouth portion 2 reaches the trunk portion 4 via the shoulder portion 3, and the trunk portion 4 is constituted by a side wall 22, and a lower portion of the side wall 22 is connected to the bottom portion 5.
前記胴部４は、上述のように、その横断面形状がほぼ正方形であり、中間にある横溝３０を境に前記上半部１２と下半部３１とに分かれ、上半部１２の角部１３に前記把手９を取り付ける前記凹部６が設けられている。この凹部６は、これに把手９を取り付けた際、胴部４の外径から外方に出ないように形成して、密着して効率よく保管できるようになっている。この凹部６には把手取付用凸部７が設けられているが、この把手取付用凸部７は、上半部１２の対角線Ｌ上の凹部６に位置し、側壁３２とパネル状端面３３とで構成している。この側壁３２は、充分高く形成されており、把手取付用凸部７回りの壁面１０と把手９との間に空隙部１１を有するようになっている。 As described above, the trunk portion 4 has a substantially square cross-sectional shape, and is divided into the upper half portion 12 and the lower half portion 31 with a lateral groove 30 in the middle as a boundary, and a corner portion of the upper half portion 12. 13 is provided with the recess 6 to which the handle 9 is attached. The concave portion 6 is formed so as not to come out from the outer diameter of the body portion 4 when the handle 9 is attached thereto, so that the concave portion 6 can be closely attached and efficiently stored. This concave portion 6 is provided with a handle mounting convex portion 7, which is located in the concave portion 6 on the diagonal L of the upper half portion 12, and has a side wall 32 and a panel-like end surface 33. It consists of. The side wall 32 is formed to be sufficiently high, and has a gap portion 11 between the wall surface 10 around the handle mounting convex portion 7 and the handle 9.
この空隙部１１は容器成形の際に、把手取付用凸部７回りの壁面１０と把手９の間に金型が入り込み、この金型を高温にすることにより、把手取付用凸部７回りの壁面１０をヒートセットすることを可能にすることができる。また、このパネル状端面３３は、フランジ状に形成され、把手取付用凸部７に把手９を取り付けた際、抜けないようになっている。 When the container 11 is molded, the gap 11 is inserted between the wall surface 10 and the handle 9 around the handle mounting convex portion 7, and the mold is heated to increase the temperature around the handle mounting convex portion 7. It is possible to heat set the wall surface 10. The panel-like end surface 33 is formed in a flange shape so that it does not come off when the handle 9 is attached to the handle attaching convex portion 7.
把手９の形状は、図６，７に示すように、把持部４０と前記容器８の把手取付用凸部７に取り付ける取付部４１とからなり、この把持部４０は横断面形状がＨ型である。図中、符号４２は外側プレート、４３は内側プレートである。また、取付部４１は、把手取付用凸部７に嵌め込むためのリング４４及びそのリング４４の上方には突起４５を有し、これらリング４４及び突起４５により、容器８の凹部６からの把手９の離脱及びガタツキを防止する。なお、図４中、４６は補強リブである。 As shown in FIGS. 6 and 7, the handle 9 includes a gripping portion 40 and a mounting portion 41 attached to the handle mounting convex portion 7 of the container 8. The gripping portion 40 has an H-shaped cross section. is there. In the figure, reference numeral 42 denotes an outer plate, and 43 denotes an inner plate. The mounting portion 41 has a ring 44 to be fitted into the handle mounting convex portion 7 and a protrusion 45 above the ring 44, and the ring 44 and the protrusion 45 allow the handle from the concave portion 6 of the container 8 to be attached. 9 is prevented from coming off and rattling. In FIG. 4, 46 is a reinforcing rib.
上記した容器８及び把手９の材質は、いずれもポリエステル製であり、例示すれば、ポリエチレンテレフタレート（ＰＥＴ）、ポリブチレンテレフタレート、エチレンテレフタレート単位を主体とする共重合ポリエステルなどである。また、把手９の材質は、ポリエチレンテレフタレート製容器の再生材であっても良く、これを採用すれば、より一層リサイクル性が増すことになる。 The materials of the container 8 and the handle 9 described above are all made of polyester. Examples thereof include polyethylene terephthalate (PET), polybutylene terephthalate, and copolyester mainly composed of ethylene terephthalate units. Moreover, the material of the handle 9 may be a recycled material of a container made of polyethylene terephthalate, and if this is adopted, the recyclability will be further increased.
次に、本発明の把手付耐熱容器１の製造方法について述べる。
まず、別体のポリエステル製の把手９を射出成形しておく。次に、容器８となるポリエステル製のプリフォームをブロー成形金型にセットし、更にブロー成形金型に射出成形した別体のポリエステル製の把手９をセットする。そして、プリフォームをブロー成形して中空の容器８にする。この際、胴部４の上半部１２の凹部６に設けた把手取付用凸部７より下の胴部４の中心軸Ｊが、把手取付用凸部７側に１．０°±０．５°傾いた形状ブロー成形金型を設計する。容器を高温の金型でヒートセットすると、金型から取り出す際に容器は若干収縮するが、インサートされた把手は収縮しないので、容器は傾き、充填、キャッピング工程で不都合を生じる。
Next, the manufacturing method of the heat-resistant container 1 with a handle of this invention is described.
First, a separate polyester handle 9 is injection molded. Next, a polyester preform to be the container 8 is set in a blow molding die, and a separate polyester handle 9 injection-molded in the blow molding die is set. Then, the preform is blow-molded into a hollow container 8. At this time, the central axis J of the body portion 4 below the handle mounting convex portion 7 provided in the concave portion 6 of the upper half portion 12 of the body portion 4 is 1.0 ° ± 0.00 mm toward the handle mounting convex portion 7 side. Design a shape blow molding mold inclined at 5 °. When the container is heat-set with a high-temperature mold, the container shrinks slightly when it is taken out from the mold, but the inserted handle does not shrink, so that the container is tilted and inconvenience occurs in the filling and capping processes.
本発明においては、容器を予め逆方向に傾けた状態で成形することにより、金型取り出指示の収縮で全体のバランスが取れ、容器の傾きが是正される。また、把手取付用凸部７
の側壁３２は、十分高く形成されており、把手取付用凸部７回りの壁面１０と把手９との間に充分余裕のある空隙部１１が形成されている。この空隙部１１には、前述したように、把手取付用凸部７回りの壁面１０と把手９の間に金型が入り込むため、この金型を高温にすることにより、把手取付用凸部７回りの壁面１０をヒートセットすることが出来、予めこの部分のひずみを除くことが出来る。
In the present invention, by forming the container in a state where the container is inclined in the reverse direction in advance, the overall balance is obtained by contraction of the mold removal instruction, and the inclination of the container is corrected. Further, the handle mounting convex portion 7
The side wall 32 is sufficiently high, and a gap 11 having a sufficient margin is formed between the wall surface 10 and the handle 9 around the handle attaching convex portion 7. As described above, since the mold enters the space 11 between the wall surface 10 around the handle mounting convex portion 7 and the handle 9, the handle mounting convex portion 7 can be obtained by increasing the temperature of the mold. The surrounding wall surface 10 can be heat set, and the distortion of this portion can be removed in advance.
なお、容器のブロー成形において、容器８の凹部６および把手取付用凸部７を成形する部位のブロー成形金型の少なくとも一部、例えば把手取付用凸部７回りの壁面１０と把手９の間に入り込む金型の上半部に、表面処理を施しておくと、ブロー成形する際、表面処理を施したブロー成形金型の部位のポリエステル素材の流れが良くなり、逆に把手取付用凸部７の下は流れづらいから、ポリエステル素材が溜まり厚くなる。したがって、把手９にて内容物入りの把手付耐熱容器１を持ち上げた際、最も荷重がかかる把手取付用凸部７の下の強度が増すことになる。 In the blow molding of the container, at least a part of the blow molding die at the part where the concave portion 6 and the handle mounting convex portion 7 of the container 8 are molded, for example, between the wall surface 10 and the handle 9 around the convex portion 7 for mounting the handle. If surface treatment is applied to the upper half of the mold that enters, the flow of the polyester material in the blow-molded mold that has undergone surface treatment is improved during blow molding, and conversely, convex portions for grip attachment. The bottom of 7 is difficult to flow, so the polyester material accumulates and becomes thicker. Therefore, when the handle-containing heat-resistant container 1 containing contents is lifted by the handle 9, the strength under the handle mounting convex portion 7 to which the load is applied most increases.
なお、前述した特許文献１では、把手取付用凸部回りの壁面と把手の間に金型が入り込んで同質の樹脂で構成される容器と把手の接触面積が減り、ブロー成形途中の樹脂と把手の間の摩擦抵抗が減少してブロー成形性が向上したが、本発明のようにヒートセットのために成形金型を高温にすると、樹脂が金型に粘着する傾向があるので、金型表面に樹脂との摩擦や密着性を低減する表面処理を施すのが好適である。
ブロー成形金型の表面処理方法は特に限定されず、それ自体公知の方法を採用することができるが、サンドブラストやイエプコ処理などの粗面化処理、テフロン（登録商標）系やフッ素系などのコーティング処理などを例示することができる。
In Patent Document 1 described above, the contact area between the container made of the same quality resin and the handle is reduced by inserting a mold between the wall surface around the handle mounting convex portion and the handle, and the resin and the handle in the middle of blow molding are reduced. The friction resistance between the molds was reduced and the blow moldability was improved. However, when the molding die is heated to a high temperature for heat setting as in the present invention, the resin tends to stick to the die. It is preferable to apply a surface treatment to reduce friction and adhesion to the resin.
The surface treatment method of the blow molding die is not particularly limited, and a publicly known method can be adopted, but roughening treatment such as sand blasting and Yepco treatment, coating such as Teflon (registered trademark) and fluorine Processing can be exemplified.
容器のブロー成形中、ブロー成形金型はヒートセットのため高温になる。把手をインサート成形するためにブロー成形金型へセットすると、把手が金型に粘着したり、変形、白化、熱劣化等を起こす虞があり、特にポリエステル製の把手ではその可能性が大きいが、ブロー成形金型の把手と接する可能性のある部位を断熱処理しておくとそのような虞がなく、良好に成形品を得ることができる。 During the blow molding of the container, the blow mold is heated due to heat setting. If the handle is set to a blow mold for insert molding, the handle may stick to the mold, or it may be deformed, whitened, thermally deteriorated, etc. If a part that may come into contact with the handle of the blow molding die is heat-insulated, there is no such concern, and a molded product can be obtained satisfactorily.
このように製造された把手付耐熱容器１は、把手取付用凸部７回りの壁面１０をヒートセットしてあるから、上記のような高温充填によっても壁面１０に皺が寄りづらくなり、把手がぐらついたり、容易に外れるのを防止することができる。また、把手９にて内容物入りの把手付耐熱容器１を持ち上げると、把手取付用凸部７の下に最も荷重がかかるが、この部分は厚いので充分な強度があり、不具合が生じない。 Since the heat-resistant container 1 with a handle manufactured in this manner heat-sets the wall surface 10 around the convex portion 7 for attaching the handle, the wrinkle is difficult to move toward the wall surface 10 even by high-temperature filling as described above. It can be prevented from wobbling or coming off easily. Further, when the heat-resistant container 1 with a handle containing the contents is lifted by the handle 9, the most load is applied below the handle mounting convex portion 7, but since this portion is thick, there is sufficient strength and no problem occurs.
なお、以下に、本発明の製造方法によって製造された把手付容器の優位性を示す。
〈試験例１〉
容器となるポリエステル製のプリフォーム及び射出成形した別体のポリエステル製の把手から、上記した製造方法にて容量２Ｌの把手付耐熱容器を作製する。
この把手付耐熱容器にて、下記の２種のテストをおこなった。
（１）把手付耐熱容器に８５℃の熱水を２Ｌ充填し、室温迄冷却した後、耐え得る落下高 さを測定した。
（２）把手取付用凸部の下の胴部の側壁の厚みを測定した。
In addition, the superiority of the container with a handle manufactured by the manufacturing method of the present invention is shown below.
<Test Example 1>
A heat-resistant container with a handle having a capacity of 2 L is produced from the polyester preform used as a container and a separate polyester handle obtained by injection molding by the above-described manufacturing method.
The following two types of tests were conducted in this heat-resistant container with a handle.
(1) 2 L of hot water at 85 ° C. was filled in a heat-resistant container with a handle, and after cooling to room temperature, the drop height that could be withstood was measured.
(2) The thickness of the side wall of the trunk portion under the handle mounting convex portion was measured.
〈対照例１〉
把手取付用凸部回りの壁面と把手との間に空隙部を設けないこと（したがって、把手と接する把手取付用凸部回りの壁面の部分はヒートセットされない。）、且つＰＦＡ系の離型剤を塗布しないこと以外、試験例１と同様にして容量２Ｌの把手付耐熱容器を作製する。試料として用いた容器はそれぞれ５個である。
<Control Example 1>
Do not provide a gap between the wall surface around the handle mounting convex portion and the handle (therefore, the portion of the wall surface around the handle mounting convex portion that is in contact with the handle is not heat set), and a PFA release agent A heat-resistant container with a handle having a capacity of 2 L is produced in the same manner as in Test Example 1 except that no coating is applied. Five containers were used as samples.
以上の測定結果は次のとおりである。
（１）＜把持部の状態＞
試験例１の把手付容器は、熱水の充填後も把手はしっかりと固定されていたのに対し、対照例１の把手付き容器は、熱水を充填すると、把手部周辺に皺が生じ、把手がぐらついたり、外れたりするものがあった。
（２）＜把手取付用凸部の下の胴部の側壁厚み＞
試験例１の把手付耐熱容器では、平均約０．３０ｍｍで、容器内部の減圧に対して外観上特に問題がなかったが、対照例１の把手付き容器では、平均約０．２５ｍｍで、把手より下の胴部が菱形状に変形したり、容器が屈曲するなどの異常が見られた。
（３）＜落下試験の結果＞
試験例１の把手付容器は、落下高さ１．２ｍまで破損等の不具合がなかったが、対照例１の把手付容器は、落下高さ０．３ｍで、すでに破損するものが見られた。
The above measurement results are as follows.
(1) <State of gripping part>
The container with a handle of Test Example 1 was firmly fixed even after filling with hot water, whereas the container with a handle of Control Example 1 was wrinkled around the handle portion when filled with hot water, There were things that the handle was wobbling or coming off.
(2) <Thickness of the side wall of the trunk below the convex part for grip attachment>
In the heat-resistant container with a handle of Test Example 1, the average was about 0.30 mm, and there was no particular problem in appearance with respect to the reduced pressure inside the container, but in the container with a handle of Control Example 1, the handle was an average of about 0.25 mm. Abnormalities such as the lower body deformed into a diamond shape and the container bent were observed.
(3) <Result of drop test>
Although the container with a handle of Test Example 1 had no defects such as breakage up to a drop height of 1.2 m, the container with a handle of Control Example 1 had a drop height of 0.3 m and was already broken. .
以上、本発明の実施例１を説明したが、具体的な構成はこれに限定されず、また、容器の胴部の横断面形状もほぼ四角形であるとしたが、本発明の要旨を逸脱しない範囲での変更は適宜可能であることは理解されるべきである。 Although the first embodiment of the present invention has been described above, the specific configuration is not limited to this, and the cross-sectional shape of the body portion of the container is substantially square, but does not depart from the gist of the present invention. It should be understood that changes in range are possible as appropriate.
本発明の把手付耐熱容器の製造方法によれば、高温充填によっても壁面に皺が寄りづらくなり、把手がぐらついたり、容易に外れるのを防止することができる把手付耐熱容器を製造することができ、特に耐熱性を要求されその上リサイクル性も要求されるような把手付耐熱容器を得たい場合に、利用可能性が極めて高くなる。 According to the method for manufacturing a heat-resistant container with a handle of the present invention, it is possible to manufacture a heat-resistant container with a handle that can prevent wrinkles from coming to the wall surface even by high-temperature filling and prevent the handle from wobbling or easily coming off. In particular, when it is desired to obtain a heat-resistant container with a handle that requires heat resistance and also requires recyclability, the applicability becomes extremely high.
１ 把手付耐熱容器
２ 口部
３ 肩部
４ 胴部
５ 底部
６ 凹部
７ 把手取付用凸部
８ 容器
９ 把手
１０ 壁面
１１ 空隙部
１２ 上半部
１３ 角部
１４ 縦リブ
２０ ネジ
２１ フランジ
２２ 側壁
３０ 横溝
３１ 下半部
３２ 側壁
３３ パネル状端面
４０ 把持部
４１ 取付部
４２ 外側プレート
４３ 内側プレート
４４ リング
４５ 突起
４６ 補強リブ
DESCRIPTION OF SYMBOLS 1 Heat-resistant container with a handle 2 Mouth part 3 Shoulder part 4 Trunk part 5 Bottom part 6 Concave part 7 Convex part for handle attachment 8 Container 9 Handle 10 Wall surface 11 Cavity part 12 Upper half part 13 Corner | angular part 14 Vertical rib 20 Screw 21 Flange 22 Side wall 30 Horizontal groove 31 Lower half portion 32 Side wall 33 Panel-shaped end face 40 Grip portion 41 Mounting portion 42 Outer plate 43 Inner plate 44 Ring 45 Projection 46 Reinforcement rib
Claims (3)
The manufacturing method of the heat-resistant container with a handle according to claim 1 or 2, wherein a part that may come into contact with the handle of the blow molding die is heat-insulated in the insert molding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011137891A JP5077463B2 (en) | 2011-06-22 | 2011-06-22 | Manufacturing method of heat-resistant container with handle |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2011137891A JP5077463B2 (en) | 2011-06-22 | 2011-06-22 | Manufacturing method of heat-resistant container with handle |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| JP2005156768A Division JP4887665B2 (en) | 2005-05-30 | 2005-05-30 | Heat-resistant container with handle |
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| JP2011189993A JP2011189993A (en) | 2011-09-29 |
| JP5077463B2 true JP5077463B2 (en) | 2012-11-21 |
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| WO2014092135A1 (en) | 2012-12-14 | 2014-06-19 | 日精エー・エス・ビー機械株式会社 | Mold for vessel with handle, method for producing vessel with handle, and vessel with handle |
| US10183435B2 (en) | 2013-08-21 | 2019-01-22 | Nissei Asb Machine Co., Ltd. | Method for manufacturing container with handle, apparatus for manufacturing container with handle, and container with handle |
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