JPH03224719A - Mold for manufacture of hollow molded product - Google Patents
Mold for manufacture of hollow molded productInfo
- Publication number
- JPH03224719A JPH03224719A JP2101490A JP2101490A JPH03224719A JP H03224719 A JPH03224719 A JP H03224719A JP 2101490 A JP2101490 A JP 2101490A JP 2101490 A JP2101490 A JP 2101490A JP H03224719 A JPH03224719 A JP H03224719A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- fluid
- fluid injection
- pin
- push
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 239000012530 fluid Substances 0.000 claims abstract description 87
- 238000002347 injection Methods 0.000 claims abstract description 76
- 239000007924 injection Substances 0.000 claims abstract description 76
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 34
- 239000000057 synthetic resin Substances 0.000 claims abstract description 34
- 238000000465 moulding Methods 0.000 claims abstract description 7
- 238000003780 insertion Methods 0.000 claims description 25
- 230000037431 insertion Effects 0.000 claims description 25
- 229920005989 resin Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1734—Nozzles therefor
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、中空成形品製造用の成形型に関し。[Detailed description of the invention] [Industrial application field] The present invention relates to a mold for producing a hollow molded product.
更に具体的にはキャビティ内に射出された軟化状態の合
成樹脂中に中空部形成用の流体を注入するための流体注
入通路の構造に関する。More specifically, the present invention relates to the structure of a fluid injection passage for injecting a fluid for forming a hollow portion into a softened synthetic resin injected into a cavity.
〔従来技術］
合成樹脂の中空成形品は、成形型のキャビティ内に軟化
状態の合成樹脂を射出すると共に、該合成樹脂内に窒素
ガス、水等の流体を注入して、その内部を中空とするこ
とにより製造する。[Prior art] Synthetic resin hollow molded products are made by injecting softened synthetic resin into the cavity of a mold and injecting a fluid such as nitrogen gas or water into the synthetic resin to make the inside hollow. Manufactured by
そして従来 かかる中空成形品の製造に用いる成形型と
しては
（１） キャビティ内に軟化状態の合成樹脂を射出す
る樹脂射出通路と、キャビティ内の軟化状態の合成樹脂
中に中空部形成用の流体を注入するための流体注入通路
とを同じ通路（例えばスプルー）にて兼用させたもの（
特公昭５７−１４９６８号公報）。Conventionally, the molds used to manufacture such hollow molded products include (1) a resin injection passage for injecting softened synthetic resin into the cavity, and a fluid for forming the hollow part into the softened synthetic resin in the cavity. The same passage (e.g. sprue) that also serves as the fluid injection passage for injection (
(Special Publication No. 57-14968).
（２）上記樹脂射出通路とは別に、成形型に上記流体注
入通路を特別に設けたもの（特公昭５８２１１４２５号
公報）
等の成形型が一般的に知られている。(2) Molding molds such as those in which the fluid injection passage is specially provided in addition to the resin injection passage (Japanese Patent Publication No. 58211425) are generally known.
第８図は前者の成形型の具体的な構造を表す図面であっ
て、該成形型はまず、固定板９１０に取り付けた固定型
９１と、可動板９２０に取り付けた可動型９２と９両型
９１．９２の間に形成したキャビティ９０と、該キャビ
ティ内に軟化状態の合成樹脂８１を射出するための樹脂
射出通路９１１と、該キャビティ９０内の軟化状態の合
成樹脂８１内に流体８２を注入するための流体注入通路
９１１（樹脂射出通路と流体注入通路は兼用する）と、
成形された中空成形品を成形型の外部へ押し出すための
押し上げピン９３及びそのピン挿通孔９２１とを有する
。FIG. 8 is a drawing showing the specific structure of the former mold, which consists of a fixed mold 91 attached to a fixed plate 910, a movable mold 92 attached to a movable plate 920, and 9 molds. A cavity 90 formed between 91 and 92, a resin injection passage 911 for injecting the softened synthetic resin 81 into the cavity, and a fluid 82 injected into the softened synthetic resin 81 in the cavity 90. a fluid injection passage 911 (the resin injection passage and the fluid injection passage are shared),
It has a push-up pin 93 and a pin insertion hole 921 for pushing the formed hollow molded product out of the mold.
上記押し上げピン９３の基部は押し一ヒげ板９４に連結
する。該押し上げ板９４は、これを上下動させるアクチ
ュエータ（図示路）に接続する。The base of the push-up pin 93 is connected to a push-up plate 94. The push-up plate 94 is connected to an actuator (path shown) that moves it up and down.
また、上記固定型９１に穿設した上記樹脂射出通路９１
１には、射出ノズル９５を連結する。Further, the resin injection passage 91 bored in the fixed mold 91
1 is connected to an injection nozzle 95.
そして、中空成形品の製造に当たっては、第８図に示す
ごと（、射出用ノズル９５よりキャビティ９０内に軟化
状態の合成樹脂８１をショートシッットにて射出する。In manufacturing the hollow molded product, as shown in FIG. 8, a softened synthetic resin 81 is injected into the cavity 90 from an injection nozzle 95 in a short shot.
このシジートショノトされた合成樹脂の射出量は、キャ
ビティ容積（即ち中空成形品容積）から中空部（即ち流
体注入量）を差し引いた容量である。そして、上記射出
後直ちに、窒素ガス等の流体８２を流体注入通路９１１
を通じて注入する。The injection amount of the injected synthetic resin is the volume obtained by subtracting the hollow part (i.e., the fluid injection amount) from the cavity volume (i.e., the volume of the hollow molded product). Immediately after the injection, the fluid 82 such as nitrogen gas is introduced into the fluid injection passage 911.
Inject through.
これにより、キャビティ９０内の軟化状態の合成樹脂８
１は、その内部に注入されてくる流体８２によって、キ
ャビテイ壁面及びキャビティ空間部分へ押し付けられる
。そして１合成樹脂８１とその内部の流体８２とによっ
て、キャビティ９０内が充満された後１図示省略する冷
却管に水を流し２合成樹脂８１を冷却、固化させる。As a result, the softened synthetic resin 8 inside the cavity 90
1 is pressed against the cavity wall surface and the cavity space portion by the fluid 82 injected into the interior thereof. After the cavity 90 is filled with the synthetic resin 81 and the fluid 82 therein, water is flowed through a cooling pipe (not shown) to cool and solidify the synthetic resin 81.
その後は、可動型９２及び可動板９２０を、下降させる
。これにより、固定型９１と可動型９２とが離れ、キャ
ビティ９０が開口する。そこで押し上げピン９３を押し
上げ板９４により押し上げ、キャビティ９０内の中空成
形品を取り出す。After that, the movable mold 92 and the movable plate 920 are lowered. As a result, the fixed mold 91 and the movable mold 92 are separated, and the cavity 90 is opened. Then, the push-up pin 93 is pushed up by the push-up plate 94, and the hollow molded product inside the cavity 90 is taken out.
また、第９図は後者、即ち、樹脂射出通路と流体注入通
路とを別個に設けた成形型の具体的構造を表す図面であ
って、該成形型の可動型９２には。Moreover, FIG. 9 is a drawing showing the specific structure of the latter, that is, a mold in which a resin injection passage and a fluid injection passage are separately provided in the movable die 92 of the mold.
流体注入通路９２２を穿設する。そして、該流体注入通
路９２２を流体注入装置（図示路）に連通させる。A fluid injection passage 922 is drilled. Then, the fluid injection passage 922 is communicated with a fluid injection device (the illustrated path).
従って、該成形型においては、第９図に示すごとく、可
動型９２側からキャビティ９０内の合成樹脂中に、流体
を注入する。Therefore, in this mold, as shown in FIG. 9, fluid is injected into the synthetic resin in the cavity 90 from the movable mold 92 side.
しかしながら、従来の成形型においては２次の問題点を
有する。However, conventional molds have secondary problems.
前者の成形型、即ち、樹脂射出通路を流体注入通路とし
て利用する成形型にあっては１合成樹脂成形品に関して
、キャビティの中央部において。In the former mold, that is, a mold that uses a resin injection passage as a fluid injection passage, in the center of the cavity for a synthetic resin molded product.
合成樹脂内を中空にすることは容易であるが、キャビテ
ィの端部において合成樹脂内を中空にすることは、成形
型の形状によっては困難な場合がある。これは、第８図
に示すごとく、樹脂射出通路を固定型の中央部に配設す
る場合が多いためであこのように、成形品の任意の部位
を中空にしようとする場合に制限を生ずる点に第１の問
題点を有する。Although it is easy to make the inside of the synthetic resin hollow, it may be difficult to make the inside of the synthetic resin hollow at the end of the cavity depending on the shape of the mold. This is because the resin injection passage is often located in the center of the fixed mold, as shown in Figure 8, and this creates a restriction when attempting to make any part of the molded product hollow. The first problem lies in this point.
また、後者の成形型、即ち、樹脂射出通路と流体注入通
路とを別個に設けた成形型にあっては成形型内には冷却
管等も配管されるため、成形型の構造上及びサイズ上、
流体注入通路を付加することができない場合もある。こ
の点に第２の問題点を有する。In addition, in the latter mold, that is, a mold that has separate resin injection passages and fluid injection passages, cooling pipes and the like are installed inside the mold, so there are problems with the structure and size of the mold. ,
In some cases, it may not be possible to add a fluid injection passage. There is a second problem in this point.
本発明は、かかる従来の問題点に鑑み、成形品の任意の
部位を中空にすることができ、かつ、成形型に流体注入
通路を付加することが容易な中空成形品製造用の成形型
を提供しようとするものである。In view of these conventional problems, the present invention provides a mold for producing hollow molded products, which allows any part of the molded product to be made hollow, and in which it is easy to add a fluid injection passage to the mold. This is what we are trying to provide.
〔課題の解決手段〕
本発明は３合成樹脂の中空成形品を成形するためのキャ
ビティと、該キャビティ内に軟化状態の合成樹脂を射出
する樹脂射出通路と、キャビティ内の上記軟化状態の合
成樹脂中に流体注入装置により中空部形成用の流体を注
入するための流体注人通路と、成形された中空成形品を
成形型の外部へ押し出すための押し上げピン及びそのピ
ン挿通孔とを有する中空成形品製造用の成形型において
。[Means for Solving the Problem] The present invention has three cavities for molding a synthetic resin hollow molded product, a resin injection passage for injecting the softened synthetic resin into the cavity, and a resin injection passage for injecting the softened synthetic resin into the cavity. A blow molding having a fluid injection passage for injecting a fluid for forming a hollow part with a fluid injection device, and a push-up pin and pin insertion hole for pushing the formed hollow molded product out of the mold. In molds for manufacturing products.
前記流体注入通路は、前記押し上げピンとピン挿通孔と
の間に形成するクリアランスに沿って形成し、また該流
体注入通路は、前記流体注入装置に連通させたことを特
徴とする中空成形品製造用の成形型にある。The fluid injection passage is formed along a clearance formed between the push-up pin and the pin insertion hole, and the fluid injection passage is communicated with the fluid injection device. in the mold.
本発明において最も注目すべきことは どのような成形
型にも使用される押し上げピンとピン挿通孔間に形成す
るクリアランスを利用して、流体注入通路を形成したこ
とにある。The most noteworthy feature of the present invention is that the fluid injection passage is formed by utilizing the clearance formed between the push-up pin and the pin insertion hole, which are used in any mold.
上記流体注入通路の形成手段としては、下記のものがあ
る。Examples of means for forming the fluid injection passage include the following.
（１）上記クリアランスの幅を広げることにより形成す
る方法（第１実施例）。(1) A method of forming the above-mentioned clearance by widening its width (first embodiment).
（２）上記押し上げピンの外周部に溝部を刻設すること
により形成する方法（第２実施例）。(2) A method of forming a groove by carving a groove in the outer periphery of the push-up pin (second embodiment).
（３）上記ピン挿通孔の内周部に溝部を刻設することに
より形成する方法（第３実施例）。(3) A method of forming a groove by carving a groove in the inner circumference of the pin insertion hole (third embodiment).
（４）上記押し上げピンとピン挿通孔の両方に溝部を刻
設することにより形成する方法。(4) A method in which a groove is formed in both the push-up pin and the pin insertion hole.
上記流体注入通路は、いずれの形成手段であっても、そ
の隙間の幅寸法が０．２−以下となる必要がある。これ
は、 ０． ２ｒｍを越えると、キャビティ内に射出
された軟化状態の合成樹脂が、その高圧のために、押し
上げピンの流体注入経路内に侵入するおそれがあるから
である。Regardless of the means used to form the fluid injection passage, the width of the gap must be 0.2- or less. This is 0. This is because if it exceeds 2rm, the softened synthetic resin injected into the cavity may enter the fluid injection path of the push-up pin due to its high pressure.
上記（２）〜（４）の流体注入通路は押し上げピンの外
周部に沿って、或いはピン挿通孔の内周部に沿って、或
いはその両方に複数箇所に設けることも可能である。The fluid injection passages (2) to (4) above may be provided at a plurality of locations along the outer circumference of the push-up pin, along the inner circumference of the pin insertion hole, or both.
また、上記のごとく、流体注入通路は押し上げピンとピ
ン挿通孔間に形成するクリアランスに沿って設けるが、
かかる押し上げピンは１本ないし複数本設ける。複数本
設けた場合には、各箇所より流体注入が行われる。また
１本発明にかかる流体注入通路を形成した押し上げピン
と共に、従来と同様の流体注入通路のない押し上げピン
を併設できることは勿論である。Furthermore, as mentioned above, the fluid injection passage is provided along the clearance formed between the push-up pin and the pin insertion hole;
One or more such push-up pins are provided. If multiple locations are provided, fluid is injected from each location. Furthermore, it goes without saying that in addition to the push-up pin with a fluid injection passage according to the present invention, a push-up pin without a fluid injection passage similar to the conventional one can also be provided.
また、上記流体注入通路には、逆止弁を設けることもで
きる。これにより、軟化状態の合成樹脂が流体注入通路
内に逆流することを、確実に防止することができる。Furthermore, a check valve may be provided in the fluid injection passage. Thereby, it is possible to reliably prevent the softened synthetic resin from flowing back into the fluid injection passage.
本発明においては、キャビティ内に軟化状態の合成樹脂
を射出した後、押し上げピンとピン挿通孔間に形成する
クリアランスに沿って設けた流体注入通路により軟化状
態の合成樹脂中にガス、水等の流体を注入する。そして
、従来と同様に中空成形品を製造する。また、中空成形
品の製造後はキャビティを開き、上記押し上げピンを押
し上げて、キャビティ内の中空成形品を押し出す。In the present invention, after the softened synthetic resin is injected into the cavity, a fluid such as gas, water, etc. inject. Then, a blow molded product is manufactured in the same manner as before. After manufacturing the hollow molded product, the cavity is opened and the push-up pin is pushed up to push out the hollow molded product inside the cavity.
そして２本発明においては、流体注入通路は押し上げピ
ンとピン挿通孔間に形成するクリアランスに沿って形成
したこと、及び該押し上げピンが一般に複数本設けられ
ることにより、成形品の任意の部位に流体を注入するこ
とができる。2. In the present invention, the fluid injection passage is formed along the clearance formed between the push-up pin and the pin insertion hole, and a plurality of push-up pins are generally provided, so that the fluid can be injected into any part of the molded product. Can be injected.
また、上記のようにクリアランスに沿って流体注入通路
を形成したことにより、現行使用している一般の成形型
を中空成形品製造用の成形型に金型改造すべく、流体注
入通路を付加することも容易である。In addition, by forming the fluid injection passage along the clearance as described above, it is possible to add a fluid injection passage in order to modify the general mold currently in use into a mold for manufacturing hollow molded products. It is also easy.
（効 果〕
それ故１本発明によれば、成形品の任意の部位を中空に
することができ、かつ現行使用している一般の成形型を
中空成形品製造用の成形型に改造することが容易である
。中空成形品製造用の成形型を提供することができる。(Effects) Therefore, 1. According to the present invention, any part of a molded product can be made hollow, and a general mold currently in use can be modified into a mold for manufacturing hollow molded products. It is easy to provide a mold for producing hollow molded products.
第１実施例
本発明の実施例にかかる。中空成形品製造用の成形型に
つき、第１図及び第２図を用いて説明する。First Embodiment This is an embodiment of the present invention. A mold for producing a hollow molded product will be explained using FIGS. 1 and 2.
本例の成形型は、押し上げシン９３とピン挿通孔１間に
形成するクリアランスＣの幅を広げることにより、流体
注入通路２を形成したものである。In the mold of this example, the fluid injection passage 2 is formed by widening the width of the clearance C formed between the push-up thin 93 and the pin insertion hole 1.
本例の成形型は、第１図に示すごとく、可動型９２にお
いて、押し上げピン９３を挿通させるためのピン挿通孔
１を有する。該ピン挿通孔１と押し上げピン９３との間
には、押し上げピン９３の先端部分と対応させてクリア
ランスＣを形成する。As shown in FIG. 1, the mold of this example has a pin insertion hole 1 in a movable mold 92 through which a push-up pin 93 is inserted. A clearance C is formed between the pin insertion hole 1 and the push-up pin 93 in correspondence with the tip of the push-up pin 93.
該クリアランスＣの幅は、０．２ｍに設定しである。The width of the clearance C is set to 0.2 m.
そして、上記クリアランスＣに沿って流体注入通路２を
形成する。該流体注入通路２は、上記クリアランスＣを
そのまま利用したものであり、第２図に示すごとく、流
体注入通路２の横断面は円環状となる。Then, a fluid injection passage 2 is formed along the clearance C. The fluid injection passage 2 utilizes the clearance C as it is, and as shown in FIG. 2, the cross section of the fluid injection passage 2 is annular.
また、第１図に示すごとく、押し上げピン９３と上記ピ
ン挿通孔ｌとの間には、上記流体注入通路２に連通させ
て高圧室３を形成する。該高圧室３は、上記流体注入通
路２よりも大きな開口面積を存する。また、該高圧室３
は、可動型９２に刻設した流体供給通路３１及び流体供
給口３２を介して流体注入装置（図示路）に連通させる
。Further, as shown in FIG. 1, a high pressure chamber 3 is formed between the push-up pin 93 and the pin insertion hole 1 in communication with the fluid injection passage 2. The high pressure chamber 3 has a larger opening area than the fluid injection passage 2. In addition, the high pressure chamber 3
is communicated with a fluid injection device (path shown) via a fluid supply passage 31 and a fluid supply port 32 carved in the movable mold 92.
また、押し上げピン９３とピン挿通孔１との間には、上
記高圧室３の端部において、外部に開口するシール室４
を設ける。そして、該シール室４内には、シール部材と
しての０リング４１を嵌め込む、また、可動型９２には
、該Ｏリング４１の脱落を防止するためのシール押さえ
板４２を、固定ボルト４３により取り付ける。Further, between the push-up pin 93 and the pin insertion hole 1, there is a seal chamber 4 that opens to the outside at the end of the high pressure chamber 3.
will be established. An O-ring 41 as a sealing member is fitted into the seal chamber 4, and a seal pressing plate 42 is attached to the movable mold 92 by fixing bolts 43 to prevent the O-ring 41 from falling off. Attach.
その他は、前述の従来例（第８図及び第９図）と同様で
ある。The rest is the same as the conventional example described above (FIGS. 8 and 9).
本例の成形型は、上記のように構成されているので５次
の作用効果を呈する。Since the mold of this example is configured as described above, it exhibits the fifth-order effect.
本例の成形型を用いて中空成形品を製造するに当たって
は、従来と同様にキャビティ９０内に軟化状態の合成樹
脂（図示路）を射出する。そして。In manufacturing a hollow molded product using the mold of this example, a softened synthetic resin (path shown) is injected into the cavity 90 in the same manner as in the prior art. and.
キャビティ９０内において該軟化状態の合成樹脂が流体
注入通路２よりも外側に位置した時点で該流体注入通路
２により合成樹脂中へ窒素ガスを用いた流体８２を注入
する。When the softened synthetic resin is located outside the fluid injection passage 2 in the cavity 90, a fluid 82 using nitrogen gas is injected into the synthetic resin through the fluid injection passage 2.
この場合において、流体注入装置により流体供給口３２
及び流体供給通路３１を介して高圧室３内に流体８２を
一旦送り込む、このようにして高圧室３内に流体８２を
一旦貯留させておいてから。In this case, the fluid supply port 32 is
Then, the fluid 82 is once sent into the high pressure chamber 3 via the fluid supply passage 31, and the fluid 82 is temporarily stored in the high pressure chamber 3 in this way.
流体注入通路２により軟化状態の合成樹脂中へ該流体８
２を注入する。また、０リング４１は、高圧室３内の流
体８２が外部に漏れることを防止する。The fluid 8 is introduced into the softened synthetic resin through the fluid injection passage 2.
Inject 2. Further, the O-ring 41 prevents the fluid 82 in the high pressure chamber 3 from leaking to the outside.
そして、従来と同様に中空成形品を製造する。Then, a blow molded product is manufactured in the same manner as before.
成形後、可動型９２を下降させて、キャビティ９０を開
き１次いで押し上げ板９４を上昇させて押し上げピン９
３を押し上げる。これにより、キャビティ内の中空成形
品は外へ押し出される。After molding, the movable mold 92 is lowered to open the cavity 90 and the push-up plate 94 is then raised to release the push-up pin 9.
Push up 3. As a result, the hollow molded product inside the cavity is pushed out.
上記のごとく１本例の成形型によれば、押し上げピン９
３とピン挿通孔１との間に形成するクリアランスＣを利
用して流体注入通路２を形成している。そのため、キャ
ビティ９０の中央部だけでなく、押し上げピン９３の配
設位置と対応させて広範囲に流体８２を注入することが
できる。従って、成形品の任意の部位を中空にすること
が可能である。According to one example of the mold as described above, the push-up pin 9
A fluid injection passage 2 is formed using a clearance C formed between the pin insertion hole 1 and the pin insertion hole 1 . Therefore, the fluid 82 can be injected not only into the center of the cavity 90 but also over a wide range corresponding to the position of the push-up pin 93. Therefore, it is possible to make any part of the molded product hollow.
また、上記押し上げピン９３は一般の成形型にも用いら
れるものであり、上記クリアランスＣを利用することに
より、現行使用している一般の成形型を中空成形品製造
用の成形型に金型改造することが容易である。In addition, the push-up pin 93 is also used in general molds, and by using the clearance C, the general mold currently in use can be modified into a mold for manufacturing hollow molded products. It is easy to do.
更に、流体注入通路２の幅寸法は、上記のごと＜、０．
２ａｍとしたので、該流体注入通路２内へ軟化状態の合
成樹脂が侵入することもなく、また適切な速度で流体８
２を注入することができる。Furthermore, the width dimension of the fluid injection passage 2 is as described above<,0.
2 am, the softened synthetic resin will not enter into the fluid injection passage 2, and the fluid 8 will not flow at an appropriate speed.
2 can be injected.
第２実施例 本例にかかる中空成形品製造用の成形型につき。Second example Regarding the mold for manufacturing hollow molded products according to this example.
第３図及び第４図を用いて説明する。This will be explained using FIGS. 3 and 4.
本例の成形型は、クリアランスＣに沿って押し上げピン
５の外周部に溝部５１を刻設することにより、流体注入
通路２を形成したものである。In the mold of this example, the fluid injection passage 2 is formed by carving a groove 51 on the outer periphery of the push-up pin 5 along the clearance C.
即ち、第３図及び第４図に示すごとく、押し上ケヒン９
３の外周部にはクリアランスＣと連通させて溝部５を刻
設する。該溝部５は、高圧室３と連通させることが可能
なごとく、押し上げピン９３の先端部から中間部に亘っ
て形成する。また該溝部５の底部とピン挿通孔１の内周
部との間には、第４図に示すごとく、一定の隙間Ｓを設
ける。That is, as shown in FIGS. 3 and 4, the Oshiage Keihin 9
A groove 5 is formed on the outer circumferential portion of 3 so as to communicate with the clearance C. The groove portion 5 is formed from the tip of the push-up pin 93 to the middle portion so as to be able to communicate with the high pressure chamber 3 . Further, a certain gap S is provided between the bottom of the groove 5 and the inner circumference of the pin insertion hole 1, as shown in FIG.
該隙間Ｓの大きさは、０．２ａｍに設定する。The size of the gap S is set to 0.2 am.
その他は、第１実施例と同様である。The rest is the same as the first embodiment.
なお２本例におけるクリアランスＣの幅は、押し上げピ
ン９３が挿通可能な範囲（一般に０．０２〜０．０４ａ
ｍ）に設定する。Note that the width of the clearance C in the two examples is within the range through which the push-up pin 93 can be inserted (generally 0.02 to 0.04 mm).
m).
従って２本例においても、第１実施例と同様の効果を得
ることができる。Therefore, the same effects as in the first embodiment can be obtained also in the two embodiments.
第３実施例
本例にかかる中空成形品製造用の成形型につき第５図及
び第６図を用いて説明する。Third Embodiment A mold for producing a hollow molded article according to this embodiment will be explained with reference to FIGS. 5 and 6.
本例の成形型は、クリアランスＣに沿ってピン挿通孔１
の内周部に溝部６を刻設することにより流体注入通路２
を形成したものである。The mold of this example has a pin insertion hole 1 along the clearance C.
Fluid injection passage 2 is formed by carving a groove 6 on the inner circumference of
was formed.
即ち、第５図及び第６図に示すごとく、ピン挿通孔１の
内周部には、クリアランスＣと連通させて溝部６を刻設
する。該溝部６は、高圧室３と連通させることが可能な
ごとく、可動型９２において、キャビティ９０に面する
上端部から中間部に亘って形成する。また、該溝部６の
底部と押し上げピン９３の外周部との間には、第６図に
示すごとく、一定の隙間Ｓを設ける。該隙間Ｓの大きさ
は、０．２ｍｍに設定する。That is, as shown in FIGS. 5 and 6, a groove 6 is formed in the inner peripheral portion of the pin insertion hole 1 so as to communicate with the clearance C. The groove portion 6 is formed in the movable mold 92 from the upper end facing the cavity 90 to the middle portion so as to be able to communicate with the high pressure chamber 3 . Further, a certain gap S is provided between the bottom of the groove 6 and the outer circumference of the push-up pin 93, as shown in FIG. The size of the gap S is set to 0.2 mm.
また、クリアランスＣの大きさは、第２実施例と同様に
設定する。Further, the size of the clearance C is set in the same manner as in the second embodiment.
その他は、第１実施例と同様である。The rest is the same as the first embodiment.
従って１本例においても、第１実施例と同様の効果を得
ることができる。Therefore, even in this example, the same effects as in the first example can be obtained.
第４実施例 本例にかかる中空成形品製造用の成形型につき。Fourth example Regarding the mold for manufacturing hollow molded products according to this example.
第７図を用いて説明する。This will be explained using FIG.
本例の成形型は、第１実施例において、シール部材とし
てのＯリング４１に代えて、シール７を用いたものであ
る。The mold of this example uses a seal 7 instead of the O-ring 41 as a seal member in the first example.
即ち、第７図に示すごと（、シール７は、ゴムを素材に
用いて断面路Ｖ字型の円環状に形成するシール本体部７
１と、該シール本体部７１内に埋設する断面路■字状の
スプリング７２とから形成する。That is, as shown in FIG.
1, and a spring 72 embedded in the seal main body 71 and having a cross section shaped like a square.
その他は、第１実施例と同様である。The rest is the same as the first embodiment.
従って１本例においても、第１実施例と同様の効果を得
ることができる。Therefore, even in this example, the same effects as in the first example can be obtained.
第１図及び第２図は第１実施例を示し、第１図は中空成
形品製造用の成形型の要部断面図、第２図は押し上げピ
ン及びピン挿通孔部分の拡大横断面図、第３図及び第４
図は第２実施例を示し、第３図は中空成形品製造用の成
形型の要部断面間第４図は押し上げピン及びピン挿通孔
部分の拡大横断面図、第５図及び第６図は第３寞施例を
示し第５図は中空成形品製造用の成形型の要部断面図第
６図は押し上げピン及びピン挿通孔部分の拡大横断面図
、第７図は第４実施例にかかる中空成形品製造用の成形
型の要部断面図、第８図及び第９図は従来技術を示し、
第８図は従来の中空成形品製造用の成形型の全体断面図
、第９図は他の従来の同様の全体断面図である。
１゜
３゜
４゜
４１゜
５、６゜
ピン挿通孔。
流体注入通路。
高圧室。
シール室。
０リング。
６．溝部
７１１．シール。
９０、、、キャビティ
９１、、、固定型。
９２、、、可動型。
９３、、、押し上げピン。
Ｃ０１，クリアランス。
Ｓ９０．隙間
出
代
願人
豊田
埋入1 and 2 show a first embodiment, FIG. 1 is a sectional view of the main part of a mold for manufacturing a hollow molded product, FIG. 2 is an enlarged cross-sectional view of a push-up pin and a pin insertion hole, Figures 3 and 4
The drawings show the second embodiment, Fig. 3 is a cross-sectional view of the main part of a mold for manufacturing a hollow molded product, Fig. 4 is an enlarged cross-sectional view of the push-up pin and pin insertion hole, and Figs. 5 and 6. 5 shows the third embodiment, FIG. 5 is a cross-sectional view of the main parts of a mold for manufacturing hollow molded products. FIG. 6 is an enlarged cross-sectional view of the push-up pin and pin insertion hole, and FIG. 7 is the fourth embodiment. 8 and 9, which are cross-sectional views of main parts of a mold for producing a hollow molded product, show the prior art,
FIG. 8 is an overall sectional view of a conventional mold for manufacturing a hollow molded product, and FIG. 9 is an overall sectional view of another similar conventional mold. 1゜3゜4゜41゜5, 6゜pin insertion hole. Fluid injection passage. Hyperbaric chamber. Seal room. 0 ring. 6. Groove portion 711. sticker. 90,,Cavity 91,,Fixed type. 92,, Movable type. 93... Push up pin. C01, clearance. S90. Gap applicant Toyota burying
Claims (1)
、該キャビティ内に軟化状態の合成樹脂を射出する樹脂
射出通路と、キャビティ内の上記軟化状態の合成樹脂中
に流体注入装置により中空部形成用の流体を注入するた
めの流体注入通路と、成形された中空成形品を成形型の
外部へ押し出すための押し上げピン及びそのピン挿通孔
とを有する中空成形品製造用の成形型において、 前記流体注入通路は、前記押し上げピンとピン挿通孔と
の間に形成するクリアランスに沿って形成し、また該流
体注入通路は、前記流体注入装置に連通させたことを特
徴とする中空成形品製造用の成形型。[Claims] A cavity for molding a synthetic resin hollow molded product, a resin injection passage for injecting a softened synthetic resin into the cavity, and a fluid injection path into the softened synthetic resin in the cavity. A molding for manufacturing a hollow molded product having a fluid injection passage for injecting a fluid for forming a hollow part by a device, and a push-up pin and pin insertion hole for pushing the molded hollow molded product out of the mold. In the mold, the fluid injection passage is formed along a clearance formed between the push-up pin and the pin insertion hole, and the fluid injection passage is communicated with the fluid injection device. Molding mold for manufacturing products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2101490A JPH03224719A (en) | 1990-01-31 | 1990-01-31 | Mold for manufacture of hollow molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2101490A JPH03224719A (en) | 1990-01-31 | 1990-01-31 | Mold for manufacture of hollow molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03224719A true JPH03224719A (en) | 1991-10-03 |
Family
ID=12043198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2101490A Pending JPH03224719A (en) | 1990-01-31 | 1990-01-31 | Mold for manufacture of hollow molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03224719A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993012919A1 (en) * | 1991-12-27 | 1993-07-08 | Asahi Kasei Kogyo Kabushiki Kaisha | Method of blow molding and pressurized fluid injection and discharge device therefor |
| JPH05285995A (en) * | 1992-04-08 | 1993-11-02 | Tekunopurasu:Kk | Gate cut structure of disk molding machine |
| EP0590021A1 (en) * | 1991-06-18 | 1994-04-06 | Nitrojection Corporation | Nozzle for gas assisted injection molding |
| EP0581908A4 (en) * | 1991-04-09 | 1995-03-22 | Nitrojection Corp | Plastic injection molding nozzle with gas assist. |
| WO1996002379A1 (en) * | 1994-07-15 | 1996-02-01 | Asahi Kasei Kogyo Kabushiki Kaisha | Method for the non-resin fluid-assisted injection molding of a resin |
| CN109159335A (en) * | 2018-09-12 | 2019-01-08 | 刘丽春 | A kind of white injection mould ejection device of anti-drawing of deep-cavity plastic part ejector sleeve recoil limit |
| EP3326778A4 (en) * | 2016-01-06 | 2019-05-01 | Yasuhiro Suzuki | Die device, molding apparatus, injection molding system, and molding manufacturing method |
-
1990
- 1990-01-31 JP JP2101490A patent/JPH03224719A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0581908A4 (en) * | 1991-04-09 | 1995-03-22 | Nitrojection Corp | Plastic injection molding nozzle with gas assist. |
| EP0590021A1 (en) * | 1991-06-18 | 1994-04-06 | Nitrojection Corporation | Nozzle for gas assisted injection molding |
| EP0590021A4 (en) * | 1991-06-18 | 1995-03-22 | Nitrojection Corp | Nozzle for gas assisted injection molding. |
| WO1993012919A1 (en) * | 1991-12-27 | 1993-07-08 | Asahi Kasei Kogyo Kabushiki Kaisha | Method of blow molding and pressurized fluid injection and discharge device therefor |
| US5409659A (en) * | 1991-12-27 | 1995-04-25 | Asahi Kasei Kogyo Kabushiki Kaisha | Hollow injection-molding method and pressurized fluid introducing and discharging apparatus therefor |
| JPH05285995A (en) * | 1992-04-08 | 1993-11-02 | Tekunopurasu:Kk | Gate cut structure of disk molding machine |
| WO1996002379A1 (en) * | 1994-07-15 | 1996-02-01 | Asahi Kasei Kogyo Kabushiki Kaisha | Method for the non-resin fluid-assisted injection molding of a resin |
| US5730926A (en) * | 1994-07-15 | 1998-03-24 | Asahi Kasei Kogyo Kabushiki Kaisha | Method for the non-resin fluid-assisted injection molding of a resin |
| EP3326778A4 (en) * | 2016-01-06 | 2019-05-01 | Yasuhiro Suzuki | Die device, molding apparatus, injection molding system, and molding manufacturing method |
| US11511468B2 (en) | 2016-01-06 | 2022-11-29 | Yasuhiro Suzuki | Mold device, injection molding system and method for manufacturing molded article |
| CN109159335A (en) * | 2018-09-12 | 2019-01-08 | 刘丽春 | A kind of white injection mould ejection device of anti-drawing of deep-cavity plastic part ejector sleeve recoil limit |
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