JPH07125058A - Hole forming method of blow molded product - Google Patents
Hole forming method of blow molded productInfo
- Publication number
- JPH07125058A JPH07125058A JP29911993A JP29911993A JPH07125058A JP H07125058 A JPH07125058 A JP H07125058A JP 29911993 A JP29911993 A JP 29911993A JP 29911993 A JP29911993 A JP 29911993A JP H07125058 A JPH07125058 A JP H07125058A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- molding material
- molding
- cavity
- parison
- 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.)
- Pending
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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0009—Cutting out
- B29C2793/0018—Cutting out for making a hole
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
-
- 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
- B29C49/50—Moulds having cutting or deflashing means
Landscapes
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、中空成形品の側面や底
面に孔を形成する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a hole on the side surface or bottom surface of a hollow molded article.
【0002】[0002]
【従来の技術】従来、中空成形品に空気抜き等の目的で
孔を形成する場合、成形した後でドリルにて孔を開ける
方法、或いは、孔を開けたいところを予め凸に出っ張ら
せて成形しこの部分をカッター等で切り取る方法が採ら
れている。2. Description of the Related Art Conventionally, when a hole is formed in a hollow molded article for the purpose of removing air, etc., a method of forming a hole with a drill after molding or forming a hole in a convex shape is desired. A method of cutting out this portion with a cutter or the like is adopted.
【0003】[0003]
【発明が解決しようとする課題】従来の技術で述べた前
者の方法では、孔の周りにケバが立つとともに切り子が
製品の中に残るので、後加工を必要とするという問題点
がある。また、後者の方法では、カッターによる切断を
主に手加工で行うので、孔径及びカット部形状にバラツ
キが発生し、しかも切りカスが製品の中に入るという問
題点がある。In the former method described in the prior art, there is a problem that post-processing is required because a fluff stands around the hole and the facet remains in the product. Further, in the latter method, since the cutting with a cutter is mainly performed by hand, there is a problem that the hole diameter and the shape of the cut portion are varied, and moreover the cut dust enters the product.
【0004】本発明は、上記のような問題点に鑑みなさ
れたものであり、その目的とするところは、加工工程の
削減及び品質の向上を図ることのできる中空成形品の孔
形成方法を提供することにある。The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for forming holes in a hollow molded product which can reduce the number of processing steps and improve the quality. To do.
【0005】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明の中空成形品の孔形成方法は、中空成形用金
型に先端の鋭いキリ部材をキャビティへ向けて突出しが
可能なように配設しておき、空気の吹込み時にタイミン
グを合わせてキリ部材をキャビティ内に突き出すことに
より、膨張した成形材料に孔を形成するようにしたもの
である。In order to achieve the above object, the method for forming a hole in a hollow molding product according to the present invention is designed so that a hollow member having a sharp tip can be projected toward a cavity in a hollow molding die. The hole is formed in the expanded molding material by projecting the drilling member into the cavity at the same timing when the air is blown.
【0006】[0006]
【作用】上述の構成からなる本発明の中空成形品の孔形
成方法では、成形材料が金型内で中空状に成形されると
同時に当該成形材料に対して孔が開けられる。According to the method of forming a hole for a hollow molded article of the present invention having the above-described structure, the molding material is formed into a hollow shape in the mold and at the same time a hole is opened in the molding material.
【0007】[0007]
【実施例】以下、図面を参照して本発明の実施例を説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【0008】図1は本発明を実施する中空成形機の一例
を示す概略図で、同図において1は二つ割りにした凹形
状の金型、2はパリソン3を押し出すためのダイであ
り、金型1には冷却水路4が設けられ、さらに先端の鋭
いキリ部材5とこれをキャビティ6に向けて突き出すよ
うに作動するシリンダー7が設けられている。FIG. 1 is a schematic view showing an example of a blow molding machine for carrying out the present invention. In FIG. 1, 1 is a concave mold having two halves, and 2 is a die for pushing out a parison 3, 1, a cooling water passage 4 is provided, and a sharp drilling member 5 having a sharp tip and a cylinder 7 that operates so as to project the drilling member 5 toward a cavity 6 are provided.
【0009】この中空成形機においては、押出機のホッ
パーに入れられた成形材料が押出機内で加熱溶融され、
その先端に取り付けられたダイ2によって図1に示す如
くチューブ状のパリソン3が押し出される。次いで、こ
のパリソン3を金型1で挟んだ状態とし、空気吹込口8
からパリソン3内に空気を吹き込み、図2に示すよう
に、金型1の内壁に沿って膨らませ、これと同時にタイ
ミングを合わせてキリ部材5をキャビティ6内に突き出
すことにより、膨張した成形途中の成形材料9に孔を開
ける。そして、冷却後にこの成形材料9を取り出すと、
孔の開いた中空製品が得られる。In this hollow molding machine, the molding material placed in the hopper of the extruder is heated and melted in the extruder,
As shown in FIG. 1, the tubular parison 3 is extruded by the die 2 attached to the tip thereof. Next, the parison 3 is sandwiched between the molds 1 and the air inlet 8
2, air is blown into the parison 3 to inflate it along the inner wall of the mold 1, and at the same time, the drill member 5 is projected into the cavity 6 at the same time, so that the expanded midway The molding material 9 is perforated. When the molding material 9 is taken out after cooling,
A hollow product with holes is obtained.
【0010】[0010]
【発明の効果】以上説明したように、本発明の中空成形
品の孔形成方法によれば、金型での成形と同時に成形材
料に対して孔が開けられるので、従来は成形後に行って
いた孔開けの工程が削減でき、しかも切りクズが残らな
い品質の良いものを作成することができる。As described above, according to the method for forming a hole in a hollow molded article of the present invention, a hole can be formed in a molding material at the same time as molding with a mold. It is possible to reduce the number of drilling steps, and it is possible to produce high-quality products that do not leave cutting scraps.
【図1】本発明を実施する中空成形機を示す断面図であ
る。FIG. 1 is a cross-sectional view showing a blow molding machine for carrying out the present invention.
【図2】成形時の様子を示す断面図である。FIG. 2 is a cross-sectional view showing a state during molding.
1 金型 2 ダイ 3 パリソン 4 冷却水路 5 キリ部材 6 キャビティ 7 シリンダー 8 空気吹き込み口 9 成形材料 1 Mold 2 Die 3 Parison 4 Cooling Channel 5 Drilling Member 6 Cavity 7 Cylinder 8 Air Inlet 9 Molding Material
Claims (1)
キャビティへ向けて突出しが可能なように配設してお
き、空気の吹込み時にタイミングを合わせてキリ部材を
キャビティ内に突き出すことにより、膨張した成形材料
に孔を形成することを特徴とする中空成形品の孔形成方
法。1. A hollow molding die is provided with a sharp drilling member having a sharp tip toward the cavity, and the drilling member is projected into the cavity at the same timing when air is blown. The method for forming a hole in a hollow molded article is characterized in that a hole is formed in the expanded molding material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29911993A JPH07125058A (en) | 1993-11-05 | 1993-11-05 | Hole forming method of blow molded product |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29911993A JPH07125058A (en) | 1993-11-05 | 1993-11-05 | Hole forming method of blow molded product |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07125058A true JPH07125058A (en) | 1995-05-16 |
Family
ID=17868371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP29911993A Pending JPH07125058A (en) | 1993-11-05 | 1993-11-05 | Hole forming method of blow molded product |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07125058A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112372992A (en) * | 2020-11-30 | 2021-02-19 | 重庆益弘工程塑料制品有限公司 | Cavity blowing plastics oil tank in-mould processingequipment |
CN112743624A (en) * | 2020-12-14 | 2021-05-04 | 亚普汽车部件股份有限公司 | Auxiliary mechanism and method for forming hollow body edge clamping hole |
CN116100791A (en) * | 2023-02-23 | 2023-05-12 | 飞尔德航空器材制造(上海)有限公司 | Hot press device of aviation transparent piece with bolt mounting structure |
-
1993
- 1993-11-05 JP JP29911993A patent/JPH07125058A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112372992A (en) * | 2020-11-30 | 2021-02-19 | 重庆益弘工程塑料制品有限公司 | Cavity blowing plastics oil tank in-mould processingequipment |
CN112372992B (en) * | 2020-11-30 | 2022-05-03 | 重庆益弘防务科技有限公司 | Cavity blowing plastics oil tank in-mould processingequipment |
CN112743624A (en) * | 2020-12-14 | 2021-05-04 | 亚普汽车部件股份有限公司 | Auxiliary mechanism and method for forming hollow body edge clamping hole |
CN112743624B (en) * | 2020-12-14 | 2022-05-20 | 亚普汽车部件股份有限公司 | Auxiliary mechanism and method for forming hollow body edge clamping hole |
CN116100791A (en) * | 2023-02-23 | 2023-05-12 | 飞尔德航空器材制造(上海)有限公司 | Hot press device of aviation transparent piece with bolt mounting structure |
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