JP2788066B2 - Mold for molding synthetic resin products with hinges - Google Patents
Mold for molding synthetic resin products with hingesInfo
- Publication number
- JP2788066B2 JP2788066B2 JP19315889A JP19315889A JP2788066B2 JP 2788066 B2 JP2788066 B2 JP 2788066B2 JP 19315889 A JP19315889 A JP 19315889A JP 19315889 A JP19315889 A JP 19315889A JP 2788066 B2 JP2788066 B2 JP 2788066B2
- Authority
- JP
- Japan
- Prior art keywords
- hinge
- synthetic resin
- mold
- molding
- hinges
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/22—Hinges, pivots
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7134—Crates, e.g. for bottles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、保冷、保温用の折りたたみコンテナーのよ
うに、中空の本体部品同志を、一体成形されたヒンジに
よって接続する合成樹脂製品を中空成形法によって成形
する際に用いられるヒンジ付き合成樹脂製品成形用金型
に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is a hollow molding of a synthetic resin product in which hollow main body parts are connected by an integrally molded hinge, such as a folding container for cooling and keeping heat. TECHNICAL FIELD The present invention relates to a hinged synthetic resin product molding die used when molding by a method.
ヒンジを有する合成樹脂製品としては種々なものがあ
るが、以下物流用等に使用される折りたたみコンテナー
を代表例として説明する。There are various types of synthetic resin products having a hinge, and a folding container used for distribution or the like will be described below as a representative example.
物流に使用されるコンテナーは物を入れていない場合
の運搬効率を高めるため、折りたたみ可能なことが要望
される。Containers used for logistics are required to be foldable in order to increase the transportation efficiency when no objects are placed.
ダンボール箱は、使い捨てで、梱包に使用されるまで
は折りたたまれているので、運搬やストック効率がよく
広く使用されている。しかし、耐水性が悪く強度が低
く、衛生上の問題があり、反復の使用可能な合成樹脂製
の折りたたみコンテナーが多く使用されるようになっ
た。Cardboard boxes are disposable and folded until used for packaging, so they are widely used for transportation and stock efficiency. However, due to poor water resistance, low strength, and hygiene problems, folding containers made of a synthetic resin that can be used repeatedly have been increasingly used.
上記折りたたみコンテナーは、第2図に示すように、
射出成形された熱可塑性樹脂の板1を本体部品として、
これらを金属蝶番2を用いて連結している。これを使用
する場合には、板1で箱を形成するとともに、上端縁に
とめ枠3をはめて箱4として使用する。しかし射出成形
した板1を金属蝶番2で接続する、後工程に人手を要
し、コストが高くなる欠点がある。特に保冷用に使用さ
れる保冷用コンテナーは、中に空部を有する板をつく
り、この板の空部に発泡樹脂等を充填して板の断熱性を
高めているが、蝶番によって接続した部分に隙間5を生
じ、保冷効果が低下する不都合があった。The folding container is, as shown in FIG.
The injection molded thermoplastic resin plate 1 is used as a main body part.
These are connected using a metal hinge 2. When this is used, a box is formed by the plate 1 and a stop frame 3 is fitted to the upper end edge to be used as the box 4. However, there is a disadvantage in that the injection molded plate 1 is connected with the metal hinge 2 and the post-process requires manpower and the cost is increased. In particular, cold storage containers used for cold storage are made of a plate with an empty space inside and filled with foamed resin etc. to increase the heat insulation of the plate, but the parts connected by hinges In addition, there was a problem that a gap 5 was formed in the slab, and the cooling effect was reduced.
上記問題点を解決するものとして、各板を連結する金
属蝶番2の代わりに、第3図(a)(b)に示すように
中空の板1′と一体に成形された薄い合成樹脂のヒンジ
6を有するヒンジ付のものが中空成形法によってつくら
れ、一部において商品化されている。これによって蝶番
2を取付ける後工程が不要となり、また第4図(a)
(b)に示すようにヒンジ6において折り曲げれば隙間
5が無くなるので保冷保温効果が向上する。In order to solve the above problem, a hinge made of a thin synthetic resin integrally formed with a hollow plate 1 'as shown in FIGS. 3 (a) and 3 (b), instead of the metal hinge 2 connecting the respective plates. The hinged one having 6 is made by the hollow molding method and is partially commercialized. This eliminates the need for a post-processing step for attaching the hinge 2 and, in addition, FIG.
As shown in (b), if the hinge 6 is bent, the gap 5 is eliminated, so that the cooling and warming effect is improved.
上記、第3図(a)に展開図を示すような合成樹脂製
品を作製するには、第5図(a)(b)に示すように、
対向して前進、後退する型締シリンダー7先端の型締板
8に取付けられた左右の金型9,10でパリソン(図示せ
ず)を挾持し、突出した部分11でヒンジ6を形成した後
エアブローして金型9,10内面にパリソンを密着させる。In order to produce a synthetic resin product whose development is shown in FIG. 3 (a), as shown in FIGS. 5 (a) and 5 (b),
After the parison (not shown) is clamped by the left and right dies 9, 10 attached to the clamping plate 8 at the tip of the clamping cylinder 7, which moves forward and backward, and the hinge 6 is formed by the projecting portion 11. The parison is brought into close contact with the inner surfaces of the dies 9 and 10 by air blowing.
上記エアブローを行なう場合には、ヒンジで分割され
た各板1′ごとにエアブローが行なわれるように、各板
1′ごとに金型に取付けられたエアブロー用の吹込み針
が型締めの際、パリソンを突き破りエアブローを行な
う。When the air blow is performed, the air blowing blow needle attached to the die for each plate 1 'is closed when the mold is clamped so that the air blow is performed for each plate 1' divided by the hinge. Air blow through parison.
しかしながら、保冷保温コンテナーのようにヒンジ6
の面積が広い中空成形品においては、中空成形機の型締
力が小さいため、流れの悪いパリソンを押圧してヒンジ
6部分を所望の肉厚まで押しつぶすには力不足で、薄い
肉厚とならず、ヒンジ屈伸時の柔軟性および耐久性は、
満足できる性能に達しなかった。However, the hinge 6
In the case of a hollow molded product with a large area, the mold clamping force of the hollow molding machine is small, so that it is not enough to press the parison with poor flow to crush the hinge 6 to the desired thickness. The flexibility and durability when flexing and extending the hinge
Did not reach satisfactory performance.
本発明者らは、上記の問題を解決すべく鋭意検討を重
ねた結果、ヒンジ6が薄くならないのは金型本来の表面
肌の荒いことによるすべりの悪さ、および金型冷却を行
なっているため、突出した部分が樹脂にふれると、この
部分の温度が低くなり、さらに変形しにくくなるためと
考えた。The present inventors have conducted intensive studies to solve the above-mentioned problems. As a result, the hinge 6 does not become thin because of the poor slip due to the rough surface of the mold and the cooling of the mold. If the protruding portion touches the resin, the temperature of this portion is lowered, and it is considered that the portion is hardly deformed.
本発明は上記の考えに基づいてなされたもので、薄い
ヒンジを形成することが出来る、ヒンジ付き合成樹脂製
品成形用金型を提供することを目的とする。The present invention has been made based on the above idea, and has as its object to provide a mold for forming a hinged synthetic resin product, which can form a thin hinge.
上記の目的を達成するため、本発明の方法は、中空成
形により、本体部品となる熱可塑性樹脂成形体を接続し
て、上記本体部品と一体に成形された薄い合成樹脂より
なるヒンジを有する合成樹脂製品を成形するのに用いる
ヒンジ付き合成樹脂成形用金型において、金型のヒンジ
を成形する突出した部分に、厚み2mm以下のテフロンコ
ーティングを施してある。In order to achieve the above object, the method of the present invention comprises connecting a thermoplastic resin molded body to be a main body part by hollow molding, and having a hinge made of a thin synthetic resin molded integrally with the main body part. In a synthetic resin molding die with a hinge used for molding a resin product, a protruding portion for molding a hinge of the die is coated with Teflon having a thickness of 2 mm or less.
本発明の方法は、上記の構成となっているので、パリ
ソンが突出した部分によって押圧される際のすべりがよ
く、また樹脂は断熱性の高いテフロンコーティングを介
して突出した部分と接して瞬時に変形されるので、変形
中の温度の低下が殆んどない。Since the method of the present invention has the above configuration, the parison has a good slip when pressed by the protruding portion, and the resin comes into contact with the protruding portion via the highly heat-insulating Teflon coating and instantly contacts the protruding portion. Due to the deformation, there is almost no drop in temperature during the deformation.
第1図は本発明に係るヒンジ付き合成樹脂製品の一実
施例を示すもので、金型の突出した部分11には、2mm以
下、一般には5μm〜1.5mm、好ましくは10μm〜1.5m
m、好適には10μm〜1.0mmのテフロンコーティング12が
施されている。FIG. 1 shows an embodiment of a synthetic resin product with a hinge according to the present invention, in which a protruding portion 11 of a mold has a diameter of 2 mm or less, generally 5 μm to 1.5 mm, preferably 10 μm to 1.5 m.
m, preferably 10 μm to 1.0 mm Teflon coating 12.
上記テフロンコーティング12が2mmを越えても、効果
の向上はなく、またコーティングに人手を要し経済的で
ない。If the Teflon coating 12 exceeds 2 mm, the effect is not improved, and the coating requires human labor and is not economical.
上記コーティングが薄い場合には、すべりに対する効
果は変らず、断熱効果は低くなるが、変形は瞬時に行な
われるので、パリソンが直接金型に当接する場合に比し
てスムースに変形される。When the above-mentioned coating is thin, the effect on slip does not change and the heat insulating effect is reduced, but the deformation is instantaneous, so that the parison is deformed more smoothly than when the parison directly contacts the mold.
従来の金型ではヒンジ部分の肉厚が0.3mmを目標とし
て成形しても、0.6mm程度となり、しかも安定した厚さ
が得られないが、本発明の金型を用いると、0.3mmに設
定すれば肉厚は0.3mmのものが安定して得られる。In the conventional mold, even if the thickness of the hinge part is targeted at 0.3 mm, the thickness is about 0.6 mm, and a stable thickness cannot be obtained.However, when the mold of the present invention is used, the thickness is set to 0.3 mm. If it does, the thickness of 0.3mm can be obtained stably.
したがって、ヒンジ6の屈伸性が良好となり、低温ヒ
ンジ繰返えし曲げ試験機によるヒンジの耐久試験におけ
る耐久性は格段に向上する。Therefore, the flexibility of the hinge 6 is improved, and the durability in the durability test of the hinge by the low-temperature hinge repeated bending tester is remarkably improved.
上記テフロンコーティングの代りにテフロンテープを
金型の突出した部分に貼り付けても、同様な効果があ
る。The same effect can be obtained by attaching a Teflon tape to the protruding portion of the mold instead of the Teflon coating.
また、ヒンジの任意の個所のみを薄肉化することも容
易である。In addition, it is easy to reduce the thickness of only an optional portion of the hinge.
実施例1、比較例1 本発明の突出した部分に0.5mmのテフロンコーティン
グを施した金型、およびテフロンコーティングを施して
いない従来の金型を用いて、同一条件による中空成形法
によって、第3図(a)に示す折りたたみコンテナーを
成形した。Example 1 and Comparative Example 1 Using a mold having a 0.5 mm Teflon coating on the protruding portion of the present invention and a conventional mold having no Teflon coating, a third molding was performed by a hollow molding method under the same conditions. The folding container shown in FIG.
(1) 成形したコンテナーの寸法は300×450×300m
m、製品重量は2.5kg、 (2) 材料は、ポリプロピレン/ポリエチレンが5/5
のブレンド物、 (3) 成形条件は、型締圧力:30ton、樹脂温度:210℃
とした。(1) The dimensions of the molded container are 300 x 450 x 300m
m, product weight is 2.5kg, (2) Material is 5/5 of polypropylene / polyethylene
(3) Molding conditions: mold clamping pressure: 30 ton, resin temperature: 210 ° C
And
作製した、コンテナーを用い、温度:−40℃、曲げ角
度:180゜の条件下で低温ヒンジ繰り返えし曲げ試験を行
なった。結果を第1表に示す。Using the prepared container, a low-temperature hinge repeated bending test was performed under the conditions of a temperature of -40 ° C and a bending angle of 180 °. The results are shown in Table 1.
〔発明の効果〕 以上述べたように、本発明のヒンジ付き合成樹脂製品
成形用金型を用いることにより、複雑な金型構造や後加
工を行なうことなく、ヒンジの肉厚を、設定した寸法ど
うりに薄く出来るので、屈伸時の柔軟性がよくなり、耐
久性が大幅に向上する。そのためこの金型を、例えば保
例保温性能が要求される、折りたたみコンテナー等の作
製に利用した場合、衛生的で、耐食性、耐久性にすぐれ
たものが安価に得られるなど、その経済的効果は極めて
大きい。 [Effects of the Invention] As described above, by using the hinged synthetic resin product molding die of the present invention, the thickness of the hinge can be set to a predetermined size without performing a complicated die structure or post-processing. Because it can be made thinner, the flexibility during bending and stretching is improved, and the durability is greatly improved. Therefore, when this mold is used, for example, for manufacturing folding containers and the like, which are required to maintain heat retention, sanitary, corrosion-resistant, and excellent durability can be obtained at a low price, and the economic effect is low. Extremely large.
第1図は、本発明に係るヒンジ付き合成樹脂製品成形用
金型の一実施例を示す、突出した部分の縦断面図、第2
図は、従来のコンテナーの一例を示す斜視図、第3図
(a)(b)は一体に成形されたヒンジを有するコンテ
ナーの一例を示す斜視図で、第3図(a)は展開部、第
3図(b)は組立てた状態を示す図、第4図(a)は第
3図(a)のIV−IV線矢視断面図、第4図(b)は折り
曲げた状態を示す図、第5図(a)(b)は、左右の金
型を示す縦断面図で、第5図(a)は金型を開いた状態
を示す図、第5図(b)は閉じた状態を示す図である。 1……熱可塑性樹脂の板(板)、1′……中空の板
(板)、2……蝶番、3……枠、4,4′……箱、5……
隙間、6……合成樹脂のヒンジ(ヒンジ)、7……型締
めシリンダー、8……型締板、9……左金型、10……右
金型、11……突出した部分、12……テフロンコーティン
グ。FIG. 1 is a longitudinal sectional view of a protruding portion, showing one embodiment of a hinged synthetic resin product molding die according to the present invention.
FIGS. 3A and 3B are perspective views showing an example of a conventional container, and FIGS. 3A and 3B are perspective views showing an example of a container having an integrally formed hinge. FIG. FIG. 3 (b) is a view showing an assembled state, FIG. 4 (a) is a sectional view taken along the line IV-IV of FIG. 3 (a), and FIG. 4 (b) is a view showing a bent state. 5 (a) and 5 (b) are longitudinal sectional views showing left and right molds, FIG. 5 (a) is a view showing a state where the mold is opened, and FIG. 5 (b) is a state where the mold is closed. FIG. 1 ... thermoplastic resin plate (plate), 1 '... hollow plate (plate), 2 ... hinge, 3 ... frame, 4,4' ... box, 5 ...
Gap, 6: Synthetic resin hinge (hinge), 7: Clamp cylinder, 8: Clamp plate, 9: Left mold, 10: Right mold, 11: Protruding part, 12 ... ... Teflon coating.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 長谷川 建司 神奈川県川崎市川崎区千鳥町3―2 昭 和電工株式会社川崎樹脂研究所内 (56)参考文献 特開 昭56−13140(JP,A) 特開 昭62−85924(JP,A) (58)調査した分野(Int.Cl.6,DB名) B29C 49/48 - 49/60 B29C 33/38 - 33/42 B29C 53/06──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kenji Hasegawa 3-2 Chidoricho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Showa Electric Works Co., Ltd. Kawasaki Resin Laboratory (56) References JP-A-56-13140 (JP, A) JP-A-62-85924 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) B29C 49/48-49/60 B29C 33/38-33/42 B29C 53/06
Claims (1)
樹成形体を接続して、上記本体部品と一体に成形された
薄い合成樹脂よりなるヒンジを有する合成樹脂製品を成
形するのに用いるヒンジ付き合成樹脂製成形用金型にお
いて、金型のヒンジを成形する突出した部分に、厚み2m
m以下のテフロンコーティングを施したことを特徴とす
るヒンジ付き合成樹脂製品成形用金型。1. A hinge used for forming a synthetic resin product having a hinge made of a thin synthetic resin integrally formed with the main body part by connecting a thermoplastic resin molded body serving as a main body part by hollow molding. In the synthetic resin molding die with a thickness of 2 m,
A mold for molding synthetic resin products with hinges, characterized by having a Teflon coating of m or less.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19315889A JP2788066B2 (en) | 1989-07-26 | 1989-07-26 | Mold for molding synthetic resin products with hinges |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19315889A JP2788066B2 (en) | 1989-07-26 | 1989-07-26 | Mold for molding synthetic resin products with hinges |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0357624A JPH0357624A (en) | 1991-03-13 |
JP2788066B2 true JP2788066B2 (en) | 1998-08-20 |
Family
ID=16303249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19315889A Expired - Lifetime JP2788066B2 (en) | 1989-07-26 | 1989-07-26 | Mold for molding synthetic resin products with hinges |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2788066B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007536107A (en) * | 2004-05-04 | 2007-12-13 | ミヌタ・テクノロジー・カンパニー・リミテッド | Mold using non-crystalline fluororesin and method for producing the same |
-
1989
- 1989-07-26 JP JP19315889A patent/JP2788066B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0357624A (en) | 1991-03-13 |
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