JP2631561B2 - Blow product manufacturing method - Google Patents
Blow product manufacturing methodInfo
- Publication number
- JP2631561B2 JP2631561B2 JP1158897A JP15889789A JP2631561B2 JP 2631561 B2 JP2631561 B2 JP 2631561B2 JP 1158897 A JP1158897 A JP 1158897A JP 15889789 A JP15889789 A JP 15889789A JP 2631561 B2 JP2631561 B2 JP 2631561B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- sliding plate
- parison
- blow
- vent hole
- 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 - Fee Related
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
- 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
- B29C2049/4807—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity by movable mould parts in the mould halves
-
- 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
- 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
- B29C49/4812—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity and welding opposite wall parts of the parisons or preforms to each other
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of 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、トラックの荷台に設けるアオリ板、シート
バック、ロッドフロアー等の自動車用デッキ状構造部
材、もしくはフォークリスト等で使用する荷積み用パレ
ット等のデッキ状構造部材を得るためのブロー製品の製
造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a truck deck-like structural member such as a tilting plate, a seat back, and a rod floor provided on a truck bed, or a loading member used for a fork list or the like. The present invention relates to a method for manufacturing a blow product for obtaining a deck-shaped structural member such as a pallet.
特開昭56−120319号公報、特開昭57−118965号公報に
は、乗物用シートの合成樹脂製芯材及びその製造方法、
合成樹脂製自動車用仕切板およびその製造方法として、
第８図に示すようなブロー成形で得られた合成樹脂の中
空構造の横長ボード５で、該中空ボード５の面板5aの内
側からこの面板5aと一体的に突出する仕切体でボード５
の中空内部を区画し、この仕切体をもって補強リブ６と
したデッキ状構造部材４が示されている。JP-A-56-120319 and JP-A-57-118965 disclose a synthetic resin core material for a vehicle seat and a method for producing the same.
As a synthetic resin automotive partition plate and its manufacturing method,
As shown in FIG. 8, a horizontal board 5 having a hollow structure made of synthetic resin obtained by blow molding and having a partition body projecting integrally with the face plate 5a from the inside of the face plate 5a of the hollow board 5.
The deck-shaped structural member 4 is shown, which divides the hollow interior of the above, and uses this partition body as a reinforcing rib 6.
図示の例では、前記補強リブ６はボード５の長手方向
に沿って上下に並設したが、該補強リブ６の配列はこれ
に限定されるものでなく、縦リブとすることや縦リブ、
横リブの双方の組合せとすることも可能である。In the illustrated example, the reinforcing ribs 6 are arranged vertically along the longitudinal direction of the board 5, but the arrangement of the reinforcing ribs 6 is not limited to this, and the reinforcing ribs 6 may be vertical ribs or vertical ribs.
A combination of both lateral ribs is also possible.
このデッキ状構造部材４は、熱可塑性樹脂を原料とす
るパリソン１をブロー成形するもので、第5a図に示すよ
うにブロー成形用の分割金型2aには、油圧シリンダーに
より保持板を介して摺動板（可動コア）３を貫通状態で
先端が内側へ突出するように設け、ダイ（図示せず）か
ら押出したパリソン１を金型2a,2bで両側から挟み込
み、型締めを行う。This deck-shaped structural member 4 is for blow-molding a parison 1 made of a thermoplastic resin. As shown in FIG. 5a, a split mold 2a for blow-molding is provided by a hydraulic cylinder via a holding plate. A sliding plate (movable core) 3 is provided so that the tip protrudes inward in a penetrating state, and the parison 1 extruded from a die (not shown) is sandwiched between the molds 2a and 2b from both sides to perform mold clamping.
型締めの時、初めは摺動板３は金型2aの内側には突出
しておらず、金型2a,2bのパリソン１へのピンチオフの
のち、摺動板３を油圧シリンダーの力で突出させる。パ
リソン１は固化が始まる前であり、第5b図に示すように
摺動板３とともにパリソン１もその先端で押されて該摺
動板３の先端でパリソン１も中央で凹部となる。At the time of mold clamping, the sliding plate 3 does not initially project into the mold 2a, but after the molds 2a and 2b are pinched off to the parison 1, the sliding plate 3 is projected by the force of the hydraulic cylinder. . Before the parison 1 starts to solidify, as shown in FIG. 5b, the parison 1 is also pushed together with the sliding plate 3 at its tip, so that the parison 1 becomes a concave at the center at the tip of the sliding plate 3.
同時に、空気吹込み用ピン（図示せず）を用いてパリ
ソン１の内部に５〜7kg/cm2のエアーブローを開始す
る。At the same time, air blowing of 5 to 7 kg / cm 2 is started inside the parison 1 using an air blowing pin (not shown).
この空気の吹込みにより、パリソン１は金型2a,2b内
に一杯に膨張するとともに、その膨脹にともなってパリ
ソン１に生じた前記凹部も徐々に失われて溶着部が板状
に引伸ばされる。Due to the blowing of air, the parison 1 expands fully into the molds 2a and 2b, and the recesses formed in the parison 1 are gradually lost due to the expansion, so that the welded portion is elongated in a plate shape. .
摺動板３を後退させれば、内側に突き出されかつ融着
したパリソン１の一部は前記空気圧Ｐにより圧着され、
第5c図に示すように板状に形成されは補強リブ６を得る
ことができる。最後に、金型2a,2bを分割して後退さ
せ、固化した成型品としてのデッキ状構造部材４を金型
外へ取出す。When the sliding plate 3 is retracted, a part of the parison 1 that is protruded inward and fused is pressed by the air pressure P,
As shown in FIG. 5c, a reinforcing rib 6 formed in a plate shape can be obtained. Finally, the molds 2a and 2b are divided and retracted, and the deck-shaped structural member 4 as a solidified molded product is taken out of the mold.
前記製造方法で得られるデッキ状構造部材４は、第７
図に示す一般のブロー成形品（摺動板３を有しない分割
金型による）に比べて補強リブ６の構造剛性が優れると
ともに凹部７がないので変形しにくいものとなる。The deck-shaped structural member 4 obtained by the manufacturing method is
Compared with the general blow-molded product shown in the figure (using a split mold having no sliding plate 3), the structural strength of the reinforcing ribs 6 is excellent and the reinforcing ribs 6 are not easily deformed because there is no concave portion 7.
しかし、第６図にも示すように中空ボード５の面板5a
の補強リブ６との交差位置の外面側にスジ８が発現して
しまい、表面外観の悪い製品となるおそれがある。However, as shown in FIG.
The streaks 8 may appear on the outer surface side at the intersections with the reinforcing ribs 6, and the product may have a poor surface appearance.
このスジ８は摺動板３の逆側面に生じるもので、前記
第5b図に示すように摺動板３が後退する際、金型2bから
パリソン１の剥離部がブローアップされる時に生じるウ
ェルドによる。The streaks 8 are formed on the opposite side surface of the sliding plate 3, and as shown in FIG. 5b, when the sliding plate 3 retreats, a weld generated when the peeled portion of the parison 1 is blown up from the mold 2b. by.
本発明の目的は前記従来例の不都合を解消し、ボード
の両面板の内側へ一体的に突設させた仕切体により補強
リブを構成するブロー製品の製造方法において、製品表
面にスジの発現するのを防ぐことができるブロー製品の
製造方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the disadvantages of the prior art and to provide a method of manufacturing a blow product in which reinforcing ribs are formed by a partition body integrally protruding inside the double-sided board of a board, wherein streaks appear on the product surface. It is an object of the present invention to provide a method of manufacturing a blow product which can prevent the occurrence of the blow product.
前記目的を達成するための本発明のブロー製品の製造
方法は、第1a図〜第1c図に示すようにブロー成形用の分
割金型2a,2bの一方、金型2aに金型内側に突出可能な摺
動板３板を設け、ポリプロピレン（PP）、高密度ポリエ
チレン（HDPE）、ポリフェニレンオキシド（PPO）、ポ
リカーボネート（PC）、及びPP/HDPE複合材、及び前記
レジンとエチレン・プロピレンゴム（EPR）、エチレン
・プロピレン・ジエン共重合体ゴム（EPDM）の複合材、
及び前記レジンと無機フィラー（タルク、マイカ、ガラ
スファイバー、炭酸カルシウム等）の複合材などの合成
樹脂のパリソン１をブロー成形用の分割金型2a,2bに挿
入して型締めをする際に、この摺動板３でパリソン１を
部分的に圧着し、この圧着部を板状に成形して補強リブ
６を得るブロー製品の製造方法において、分割金型2a,2
bのうち、摺動板３を設けない側の金型2bの摺動板３へ
の対向位置またはその近傍にエアーベント孔９を設け
る。In order to achieve the above object, the method for manufacturing a blow product according to the present invention comprises, as shown in FIGS.1a to 1c, one of the split molds 2a and 2b for blow molding, and the mold 2a protrudes inside the mold. Provide three possible sliding plates, polypropylene (PP), high density polyethylene (HDPE), polyphenylene oxide (PPO), polycarbonate (PC), and PP / HDPE composite, and the resin and ethylene propylene rubber (EPR) ), Ethylene-propylene-diene copolymer rubber (EPDM) composite,
And when the parison 1 of a synthetic resin such as a composite material of the resin and an inorganic filler (talc, mica, glass fiber, calcium carbonate, etc.) is inserted into the split molds 2a and 2b for blow molding to perform mold clamping, In the method of manufacturing a blow product in which the parison 1 is partially crimped with the sliding plate 3 and the crimped portion is formed into a plate shape to obtain the reinforcing rib 6, the split molds 2a and 2
Among the b, an air vent hole 9 is provided at a position where the mold 2b on the side where the sliding plate 3 is not provided is opposed to the sliding plate 3 or in the vicinity thereof.
該エアーベント孔９は、真空ポンプに連通するバッフ
ァータンクに電磁開閉弁を介して連通し、真空吸引を行
えるようになっている。The air vent hole 9 communicates with a buffer tank that communicates with a vacuum pump via an electromagnetic on-off valve so that vacuum suction can be performed.
真空ポンプは常時作動させておき、バッファータンク
は−100mmHg以下の真空に保つ。The vacuum pump is always operated, and the buffer tank is kept at a vacuum of -100 mmHg or less.
ダイ（図示せず）から押出したパリソン１を金型2a,2
bで両側から挟み込み、型締めを行うが、金型閉止時に
電磁開閉弁を全開し、前記エアーベント孔９から金型2
a,2bの内面を吸引する。A parison 1 extruded from a die (not shown) is placed in a mold 2a, 2
When the mold is closed, the solenoid on-off valve is fully opened and the mold is closed through the air vent hole 9.
Suction the inner surfaces of a and 2b.
型締めの時、初めは摺動板３は金型2aの内側には突出
しておらず、金型2a,2bのパリソン１への金型閉止のの
ち、摺動板３を油圧シリンダーの力で突出させる。パリ
ソン１は固化が始まる前であり、第1b図に示すように摺
動板３とともにパリソン１もその先端で押されて該摺動
板３の先端でパリソン１も中央で凹部となる。At the time of mold clamping, the sliding plate 3 does not initially project into the inside of the mold 2a. After the molds 2a and 2b are closed to the parison 1, the sliding plate 3 is moved by the force of the hydraulic cylinder. Protrude. Before the solidification of the parison 1 starts, as shown in FIG. 1b, the parison 1 is pushed together with the sliding plate 3 at the tip thereof, and the parison 1 becomes a concave portion in the center at the tip of the sliding plate 3.
また、エアーベント孔９から真空吸引されるので、摺
動板３の先端で押されたパリソン１の反対側は金型2bの
内面に引付けられる。Further, since the vacuum is sucked from the air vent hole 9, the opposite side of the parison 1 pressed by the tip of the sliding plate 3 is attracted to the inner surface of the mold 2b.
同図に、空気吹込み用ピン（図示せず）を用いてパリ
ソン１の内部に５〜7kg/cm2のエアーブローを開始す
る。In this figure, an air blow of 5 to 7 kg / cm 2 is started inside the parison 1 using an air blowing pin (not shown).
この空気の吹込みにより、パリソン１は金型2a,2b内
に一杯に膨脹するとともに、その膨脹にともなってパリ
ソン１に生じた前記凹部も徐々に失われて溶着部が板状
に引伸ばされる。By this air blowing, the parison 1 is fully expanded into the molds 2a and 2b, and the concavities formed in the parison 1 are gradually lost due to the expansion, so that the welded portion is elongated in a plate shape. .
摺動板３を後退させれば、内側に突き出されかつ融着
したパリソン１の一部は前記空気圧Ｐにより圧着され、
第1c図に示すように板状に形成された補強リブ６を得る
ことができる。When the sliding plate 3 is retracted, a part of the parison 1 that is protruded inward and fused is pressed by the air pressure P,
As shown in FIG. 1c, a reinforcing rib 6 formed in a plate shape can be obtained.
エアーブロー完了と同時に、電磁開閉弁を閉じ、エア
ーベント孔９から真空吸引を停止する。Simultaneously with the completion of the air blow, the electromagnetic on-off valve is closed, and the vacuum suction from the air vent hole 9 is stopped.
最後に、金型2a,2bを分割して後退させ、固化した成
型品としてのデッキ状構造部材４を金型外へ取出す。Finally, the molds 2a and 2b are divided and retracted, and the deck-shaped structural member 4 as a solidified molded product is taken out of the mold.
さらに好ましくは、金型2aに設ける前記エアーベント
孔９の中心位置は、第２図に示すように摺動板３の中心
からの距離Ｗが製品厚みＨに対して、Ｗ≦2Hであるよう
にする。More preferably, the center position of the air vent hole 9 provided in the mold 2a is such that the distance W from the center of the sliding plate 3 with respect to the product thickness H is W ≦ 2H as shown in FIG. To
本発明によれば、エアーベント孔からの真空吸引で金
型内面を吸引するため、摺動板で圧着したパリソン部の
離面を防止できる。そのため、離面部がブローアップさ
れる時に生じるウェルドによるスジが生じない。According to the present invention, since the inner surface of the mold is sucked by vacuum suction from the air vent hole, separation of the parison portion pressed by the sliding plate can be prevented. Therefore, no streak due to weld generated when the separated surface portion is blown up does not occur.
材料樹脂としてポリプロピレンを使用し、デッキ状構
造部材として第３図に示すような３本の特殊形状補強リ
ブ６を有するブロー成形品を石川島播磨重工場（株）製
の大型ブロー成形機（IPB200C）を用いて成形した。A blow-molded product using polypropylene as a material resin and having three specially shaped reinforcing ribs 6 as deck-shaped structural members as shown in FIG. 3 is a large blow molding machine (IPB200C) manufactured by Ishikawajima-Harima Heavy Industries, Ltd. It was molded using.
実験装置及び手順は第４図に示すように、成形するた
めの金型は分割金型2a,2bの一方、金型2aに金型内側に
突出可能な摺動板３を設け、また摺動板３を設けない側
の金型2bの摺動板３への対向位置またはその近傍にエア
ーベント孔９を設けた。As shown in Fig. 4, the experimental apparatus and procedure are as follows. The mold used for molding is one of the split molds 2a and 2b, and the mold 2a is provided with a sliding plate 3 protruding inside the mold. An air vent hole 9 was provided at or near the position where the mold 2b on the side where the plate 3 was not provided faces the sliding plate 3.
該エアーベント孔９は、真空ポンプ11に連通するバッ
ファータンク10に電磁弁によるON・OFF開閉弁12を介し
て連通し、真空吸引を行えるようになっている。The air vent hole 9 communicates with a buffer tank 10 communicating with a vacuum pump 11 through an ON / OFF opening / closing valve 12 using a solenoid valve, so that vacuum suction can be performed.
真空ポンプは常時作動させておき、バッファータンク
は−100mmHg以下の真空に保つ。The vacuum pump is always operated, and the buffer tank is kept at a vacuum of -100 mmHg or less.
分割金型2a,2bを型締め後、摺動板３を突出す。同時
に、ON・OFF開閉弁12を全開とし、エアーベント孔９か
ら型内のエアーを真空吸引する。After clamping the split molds 2a and 2b, the sliding plate 3 is projected. At the same time, the ON / OFF on / off valve 12 is fully opened, and the air in the mold is suctioned from the air vent hole 9 by vacuum.
摺動板３を戻すと同時に、パリソン１をエアーでブロ
ーする。At the same time as returning the sliding plate 3, the parison 1 is blown with air.
エアーブロー完了と同時に、ON・OFF開閉弁12を全閉
とする。At the same time as the air blow, the ON / OFF on / off valve 12 is fully closed.
実験の結果を下記の表１に示す。 The results of the experiment are shown in Table 1 below.
なお、この表１での比較例1,2、実施例3,4はエアーベ
ント孔９を摺動板３の中心の真上（Ｗ＝０）に設置し、
真空吸引圧力を０〜−700mmHg迄変えた場合である。In Comparative Examples 1 and 2 and Examples 3 and 4 in Table 1, the air vent hole 9 was set just above the center of the sliding plate 3 (W = 0).
This is a case where the vacuum suction pressure is changed from 0 to -700 mmHg.
また、実施例4,5、比較例６は、真空吸引圧力を−700
mmHgに保ち、摺動板３を中心とエアーベント孔９の中心
との距離Ｗを０〜110mmまで変えた場合である。In Examples 4 and 5, and Comparative Example 6, the vacuum suction pressure was -700.
mmHg, and the distance W between the center of the sliding plate 3 and the center of the air vent hole 9 was changed from 0 to 110 mm.
この表１から知見できるように、真空吸引圧力を−10
0mmHg以下の真空に保つと、摺動板３で圧着したパリソ
ン１部の離面が無くなり、離面部がブローアップされる
時に生じていたウェルドによるスジが消えた。 As can be seen from Table 1, the vacuum suction pressure was -10
When the vacuum was maintained at 0 mmHg or less, the separation surface of one part of the parison pressed by the sliding plate 3 disappeared, and the streak caused by the weld generated when the separation part was blown up disappeared.
また、製品厚み（Ｈ＝50mm）に対し、摺動板３の中心
とエアーベント孔９の中心との距離Ｗが2H以下の場合に
は、真空吸引の結果により、スジは発現しないが、Ｗが
2Hを越えると真空吸引の効果は無くなり、スジが発生す
る。When the distance W between the center of the sliding plate 3 and the center of the air vent hole 9 is 2H or less with respect to the product thickness (H = 50 mm), no streak is produced due to the result of vacuum suction. But
If it exceeds 2H, the effect of vacuum suction is lost and streaks occur.
以上述べたように本発明のブロー製品の製造方法は、
ブロー成形用の分割金型の一方に金型内側に突出可能な
摺動板を設け、合成樹脂のパリソンをブロー成形用の分
割金型に挿入して型締めをする際に、この摺動板でパリ
ソンを部分的に圧着し、この圧着部を板状に成形して補
強リブを得る製造方法において、エアーベント孔からの
真空吸引で金型内面を吸収するため、摺動板で圧着した
パリソン部の離面を防止できるものである。As described above, the method for producing a blow product according to the present invention includes:
A sliding plate that can protrude into the inside of the mold is provided on one of the split molds for blow molding, and when the parison made of synthetic resin is inserted into the split mold for blow molding and the mold is clamped, this sliding plate is used. In a manufacturing method in which the parison is partially crimped and the crimped portion is formed into a plate shape to obtain a reinforcing rib, the parison crimped with a sliding plate to absorb the inner surface of the mold by vacuum suction from an air vent hole. This can prevent the separation of the part.
このようにして本発明によれば、表面性が重視される
自動車部品等の製品としても利用でき、応用範囲が広が
る。As described above, according to the present invention, it can be used as a product such as an automobile part where the surface property is important, and the application range is expanded.
第1a図、第1b図、第1c図は各工程を示すもので、本発明
のブロー製品の製造方法の縦断側面図、第２図は摺動板
とエアーベント孔との関係を示す説明図、第３図は本発
明方法で得られた合成樹脂のデッキ状構造部材の斜視
図、第４図は実験装置の説明図、第5a図〜第5c図は従来
の成形手段を示す縦断側面図、第６図は従来方法による
特殊補強リブを有するデッキ状構造部材の部分斜視図、
第７図は特殊補強リブを有しない従来品の要部の縦断側
面図、第８図は特殊補強リブを有するデッキ状構造部材
の斜視図である。 １……パリソン、2a,2b……金型 ３……摺動板、４……デッキ状構造部材 ５……中空ボード、5a……面板 ６……補強リブ、７……凹部 ８……スジ、９……エアーベント孔 10……バッファータンク、11……真空ポンプ 12……ON・OFF開閉弁1a, 1b, and 1c show respective steps, and are longitudinal side views of a method for producing a blow product of the present invention, and FIG. 2 is an explanatory view showing a relationship between a sliding plate and an air vent hole. Fig. 3 is a perspective view of a synthetic resin deck-like structural member obtained by the method of the present invention, Fig. 4 is an explanatory view of an experimental apparatus, and Figs. FIG. 6 is a partial perspective view of a deck-like structural member having a special reinforcing rib according to a conventional method,
FIG. 7 is a longitudinal sectional side view of a main part of a conventional product having no special reinforcing rib, and FIG. 8 is a perspective view of a deck-like structural member having a special reinforcing rib. DESCRIPTION OF SYMBOLS 1 ... Parison, 2a, 2b ... Die 3 ... Sliding plate 4, ... Deck-shaped structural member 5 ... Hollow board, 5a ... Face plate 6 ... Reinforcing rib, 7 ... Recess 8 ... Streak , 9 ... Air vent hole 10 ... Buffer tank, 11 ... Vacuum pump 12 ... ON / OFF on / off valve
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高堂 豊 神奈川県川崎市川崎区千鳥町３番１号 東燃石油化学株式会社技術開発センター 内 (72)発明者 景井 啓之 愛知県刈谷市一里山町金山100番地 ト ヨタ車体株式会社内 (72)発明者 福田 治男 愛知県刈谷市一里山町金山100番地 ト ヨタ車体株式会社内 (56)参考文献 実開 昭63−119024（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yutaka Takado 3-1 Chidoricho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Tonen Petrochemical Co., Ltd. Technology Development Center (72) Inventor Hiroyuki Keii Kanayama, Ichiriyama-cho, Kariya-shi, Aichi Prefecture 100 Toyota Auto Body Co., Ltd. (72) Inventor Haruo Fukuda 100, Ichiriyama-cho Kanayama, Kariya City, Aichi Prefecture Toyota Auto Body Co., Ltd. (56) Reference Real Opening Sho 63-119024 (JP, U)
Claims (1)
に突出可能な摺動板を設け、合成樹脂のパリソンをブロ
ー成形用の分割金型に挿入して型締めをする際に、この
摺動板でパリソンを部分的に圧着し、この圧着部を板状
に成形して補強リブを得るブロー製品の製造方法におい
て、分割金型のうち、摺動板を設けない側の金型の摺動
板への対向位置またはその近傍にエアーベント孔を設
け、金型閉止時にこのエアーベント孔から金型内面を吸
引することを特徴としたブロー製品の製造方法。A sliding plate which can protrude to the inside of the mold is provided on one of the divided molds for blow molding, and when a parison made of synthetic resin is inserted into the divided mold for blow molding to perform mold clamping. In a method of manufacturing a blow product in which a parison is partially crimped with the sliding plate and the crimped portion is formed into a plate shape to obtain reinforcing ribs, the metal mold on the side of the split mold on which the sliding plate is not provided is provided. A method of manufacturing a blow product, comprising: providing an air vent hole at a position facing a sliding plate of a mold or in the vicinity thereof; and suctioning an inner surface of the mold from the air vent hole when the mold is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1158897A JP2631561B2 (en) | 1989-06-21 | 1989-06-21 | Blow product manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1158897A JP2631561B2 (en) | 1989-06-21 | 1989-06-21 | Blow product manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03142221A JPH03142221A (en) | 1991-06-18 |
| JP2631561B2 true JP2631561B2 (en) | 1997-07-16 |
Family
ID=15681762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1158897A Expired - Fee Related JP2631561B2 (en) | 1989-06-21 | 1989-06-21 | Blow product manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2631561B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4662321B2 (en) * | 2001-08-31 | 2011-03-30 | キョーラク株式会社 | Blow molding die and blow molding method |
-
1989
- 1989-06-21 JP JP1158897A patent/JP2631561B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03142221A (en) | 1991-06-18 |
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