JPH08183038A - Release device for rubber vulcanized molded product - Google Patents
Release device for rubber vulcanized molded productInfo
- Publication number
- JPH08183038A JPH08183038A JP33745994A JP33745994A JPH08183038A JP H08183038 A JPH08183038 A JP H08183038A JP 33745994 A JP33745994 A JP 33745994A JP 33745994 A JP33745994 A JP 33745994A JP H08183038 A JPH08183038 A JP H08183038A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molded product
- scraper
- rubber
- outer peripheral
- 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.)
- Withdrawn
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、アンダカットを有する
ゴム加硫成形品を成形用金型から離型するための離型装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a releasing device for releasing a rubber vulcanized molded article having an undercut from a molding die.
【０００２】[0002]
【従来の技術】従来、例えば図４（Ａ）に示すような軸
方向一部１ａが膨らんだ筒状のゴム加硫成形品１は、同
図（Ｂ）にその成形後の型開き状態を示すように、外周
の成形面２ａが軸方向一部に大径部を有する形状の芯型
２と、その周囲に組み合わされる複数の型部材（図示省
略）とによって、前記芯型２の成形面２ａに抱きついた
状態に成形される。このようなゴム加硫成形品１と芯型
２は、アンダカット形状、すなわち離型方向（軸方向）
に対して互いに引っ掛かりとなる形状を呈するため、芯
型２の外周からゴム加硫成形品１を離型する工程は、通
常、作業員が手作業でゴム加硫成形品１をはぎ取るとい
った強制離型（無理抜きともいう）によって行われてい
る。2. Description of the Related Art Conventionally, for example, a cylindrical rubber vulcanization molded article 1 having a partially axially bulged portion 1a as shown in FIG. 4A is shown in FIG. As shown, a molding surface of the core mold 2 is formed by a core mold 2 having a shape in which the molding surface 2a on the outer periphery has a large diameter part in the axial direction, and a plurality of mold members (not shown) combined around the core mold 2. It is molded in a state of hugging 2a. Such a rubber vulcanization molded product 1 and the core mold 2 have an undercut shape, that is, a releasing direction (axial direction).
Since the rubber vulcanized molded product 1 has a shape to be caught by each other, the step of releasing the rubber vulcanized molded product 1 from the outer periphery of the core die 2 is usually a forced release such as an operator manually peeling off the rubber vulcanized molded product 1. It is performed by a mold (also called forced pulling).
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記のような
アンダカットを有する形状のゴム加硫成形品１は、芯型
２から手作業での無理抜きによって離型が行われるた
め、特に多数個取りの金型の場合は離型に時間がかか
り、生産性が低くなってしまう問題がある。また、作業
員の熟練度や癖などによっても、芯型２からのはぎ取り
に要する時間や円滑さにバラつきがあり、はぎ取りの際
に表面が損傷されたりして品質も安定しないといった問
題がある。However, the rubber vulcanization molded product 1 having the above-mentioned undercut has a particularly large number of parts because it is released from the core mold 2 by manual removal. In the case of a metal mold for removing a mold, there is a problem that it takes time to release the mold and productivity becomes low. Further, there is a problem that the time and smoothness required for stripping from the core die 2 vary depending on the skill level and habit of the worker, and the surface is damaged during stripping, resulting in unstable quality.
【０００４】本発明は、上記のような事情のもとになさ
れたもので、その技術的課題とするところは、アンダカ
ットを有するゴム加硫成形品を、手作業によらずに成形
用金型から円滑に離型させることの可能な離型装置を提
供することにある。The present invention has been made under the circumstances as described above, and its technical problem is that a rubber vulcanization molded article having an undercut is molded by a molding die without manual work. An object of the present invention is to provide a mold releasing device that can be smoothly released from a mold.
【０００５】[0005]
【課題を解決するための手段】上述した技術的課題を有
効に解決するための手段として、本発明に係るゴム加硫
成形品の離型装置は、外周の成形面にゴム加硫成形品が
抱き付いた状態に成形される芯型の前記成形面側へ向け
てスクレーパが軸方向移動自在に配置され、このスクレ
ーパは、内周面が前記芯型の成形面を含む外周面に対し
て拡縮径自在に摺接される耐熱ゴム製のスクレーパ本体
を備えるものである。As a means for effectively solving the above-mentioned technical problems, a rubber vulcanization molded product releasing apparatus according to the present invention has a rubber vulcanization molded product on the outer peripheral molding surface. A scraper is disposed so as to be axially movable toward the molding surface side of a core die that is molded in a clogged state. The scraper has an inner peripheral surface that expands and contracts with respect to an outer peripheral surface including the molding surface of the core die. The scraper main body is made of heat-resistant rubber and is slidably contacted with the scraper body.
【０００６】[0006]
【作用】ゴム加硫成形品の成形後型開きしてから、芯型
の軸方向一側に待機していたスクレーパを移動手段によ
って芯型に沿って離型方向へ移動させると、このスクレ
ーパは、耐熱ゴムからなるスクレーパ本体の内周面が芯
型の外周面と摺動し、前記成形面に抱きついているゴム
加硫成形品の一端に弾性的に当接して軸方向へ押し出
し、芯型から離型させる。そしてこの離型の過程で、ス
クレーパ本体の内周部は芯型の成形面の形状に応じて拡
縮径変形されるので、軸方向へ押圧移動されるゴム加硫
成形品に無理な変形による負荷が作用しない。また、ス
クレーパ本体は耐熱ゴム製としたため、成形時の熱によ
って容易に劣化しない。[Function] After the rubber vulcanization molded product is molded and the mold is opened, the scraper waiting on one side in the axial direction of the core mold is moved along the core mold in the releasing direction by the moving means. , The inner peripheral surface of the scraper body made of heat-resistant rubber slides with the outer peripheral surface of the core mold, and elastically abuts on one end of the rubber vulcanization molded product held on the molding surface and pushes it out in the axial direction. Release from. In the process of releasing the mold, the inner peripheral portion of the scraper body is expanded / contracted and deformed according to the shape of the molding surface of the core mold, so that the load applied by the excessive deformation on the rubber vulcanization molded product that is pressed and moved in the axial direction. Does not work. Moreover, since the scraper body is made of heat-resistant rubber, it is not easily deteriorated by heat during molding.
【０００７】[0007]
【実施例】図１は、本発明に係る離型装置の好ましい一
実施例をゴム加硫成形用金型と共に示すものである。す
なわち、ゴム加硫成形用金型は、上下に延びる軸部２１
及びその上端寄りの一部に形成された球状部２２を有す
る芯型２と、この芯型２の下端を支持する下型３と、軸
方向（上下方向）移動可能であって型締め時に芯型２の
上端に密接衝合される上型４と、径方向移動可能であっ
て型締め時に上型４の下面に密接されると共に芯型２に
おける球状部２２及びその近傍の外周を包囲するように
配置され円周方向複数に分割された中型５とからなり、
芯型２と、上型４と、中型５との間に、先に述べた図４
（Ａ）に示すような形状のゴム加硫成形品１を成形する
ための賦形空間（キャビティ）Ｃが形成されるものであ
る。FIG. 1 shows a preferred embodiment of the releasing apparatus according to the present invention together with a rubber vulcanization molding die. That is, the rubber vulcanization molding die has the shaft portion 21 extending vertically.
And a core mold 2 having a spherical portion 22 formed in a part near the upper end thereof, a lower mold 3 supporting the lower end of the core mold 2, and a core movable in the axial direction (vertical direction) and at the time of mold clamping. The upper die 4 that closely abuts the upper end of the die 2 and the upper die 4 that is movable in the radial direction and is closely attached to the lower surface of the upper die 4 when the die is clamped and surrounds the spherical portion 22 of the core die 2 and the outer periphery in the vicinity thereof. And a middle-sized mold 5 that is divided into a plurality of parts in the circumferential direction,
Between the core mold 2, the upper mold 4, and the middle mold 5, the previously described FIG.
A shaping space (cavity) C for molding the rubber vulcanization molded product 1 having a shape as shown in (A) is formed.
【０００８】そしてこの実施例による離型装置は、通常
は下型３と中型５の型締め位置との間に待機されるスク
レーパ６と、このスクレーパ６を図示の待機位置から芯
型２における球状部２２及びその近傍の外周面である成
形面２ａ側へ軸方向上側に突き上げ移動させるエジェク
タ７とからなる。スクレーパ６は、内周面が芯型２の成
形面２ａを含む外周面に対して拡縮径自在に摺接される
例えばフッ素ゴム又はシリコンゴム等の耐熱ゴム板であ
るスクレーパ本体６１と、このスクレーパ本体６１の外
周側を厚さ方向（軸方向）両側から挟持した補強支持部
材６２とからなるものである。また、エジェクタ７は図
示されていない成形機の突き上げシリンダにより軸方向
往復動作されるもので、下型３に開設された孔３ａを貫
通してスクレーパ６における補強支持部材６２の下面を
突き上げることによって、スクレーパ６を芯型２に沿っ
て移動させるようになっている。In the mold releasing apparatus according to this embodiment, a scraper 6 which is normally on standby between the lower mold 3 and the middle mold clamping position of the lower mold 3 and a spherical shape of the core mold 2 from the standby position shown in the drawing. The ejector 7 is configured to push upwardly in the axial direction toward the molding surface 2a side which is the outer peripheral surface of the portion 22 and its vicinity. The scraper 6 includes a scraper body 61, which is a heat-resistant rubber plate made of, for example, fluororubber or silicon rubber, the inner peripheral surface of which is slidably in contact with the outer peripheral surface including the molding surface 2a of the core die 2 so as to be able to expand and contract. The reinforcing support member 62 sandwiches the outer peripheral side of the main body 61 from both sides in the thickness direction (axial direction). The ejector 7 is axially reciprocated by a push-up cylinder (not shown) of a molding machine. The ejector 7 penetrates the hole 3a formed in the lower mold 3 and pushes up the lower surface of the reinforcing support member 62 in the scraper 6. The scraper 6 is moved along the core die 2.
【０００９】スクレーパ本体６１の内径は、原形におい
ては芯型２の軸部２１の外径よりも僅かに小径に形成さ
れており、したがって、図示の組み込み状態においては
芯型２の外周面に対して適当な締め付け力で密接してい
る。また、スクレーパ本体６１の外周側を挟持している
補強支持部材６２の内径は、芯型２の球状部２２の外径
よりも大径となっている。The inner diameter of the scraper main body 61 is slightly smaller than the outer diameter of the shaft portion 21 of the core die 2 in the original shape, and therefore, in the assembled state shown in the figure, it is smaller than the outer peripheral surface of the core die 2. And tighten them with a proper tightening force. Further, the inner diameter of the reinforcing support member 62 that holds the outer peripheral side of the scraper body 61 is larger than the outer diameter of the spherical portion 22 of the core die 2.
【００１０】以上の構成において、成形の際には図１に
示す状態に型締めされたゴム加硫成形用金型の芯型２、
上型４及び中型５によって形成される賦形空間Ｃ内で、
ゴム加硫成形品１が加硫成形される。このとき、芯型２
の軸部２１の下部外周には、待機状態にあるスクレーパ
６のスクレーパ本体６１の内径が密接しているが、この
スクレーパ本体６１は耐熱ゴムからなるため、加硫成形
時の熱に対して優れた耐久性を有する。With the above construction, the core mold 2 of the rubber vulcanizing mold is clamped in the state shown in FIG. 1 during molding.
In the shaping space C formed by the upper mold 4 and the middle mold 5,
The rubber vulcanization molded product 1 is vulcanized and molded. At this time, the core type 2
The inner diameter of the scraper body 61 of the scraper 6 in the standby state is in close contact with the outer periphery of the lower part of the shaft portion 21 of the above, but since the scraper body 61 is made of heat-resistant rubber, it is excellent against heat during vulcanization molding. Has excellent durability.
【００１１】ゴム加硫成形品１の加硫成形後は、上型４
が上方へ移動し、かつ中型５が径方向へ互いに分離移動
することによって図２に示すように型開きされる。この
とき、前記賦形空間Ｃで成形されたゴム加硫成形品１
は、芯型２の球状部２２の外周面及びその上下の外周面
からなる成形面２ａに抱きついた状態にある。なお、図
２の参照符号１１は、中型５の下端内周面と芯型２の軸
部２１の外周面との間の微小な隙間にゴム生地が侵入す
ることによって形成された薄バリである。After vulcanization molding of the rubber vulcanization molded article 1, the upper mold 4
Moves upward and the middle dies 5 separate from each other in the radial direction, so that the dies are opened as shown in FIG. At this time, the rubber vulcanization molded product 1 molded in the shaping space C
Is in a state of being hugged by the outer peripheral surface of the spherical portion 22 of the core die 2 and the molding surface 2a composed of the upper and lower outer peripheral surfaces thereof. Reference numeral 11 in FIG. 2 is a thin burr formed by the rubber material invading a minute gap between the inner peripheral surface of the lower end of the middle die 5 and the outer peripheral surface of the shaft portion 21 of the core die 2. .
【００１２】型開き後、前記突き上げシリンダによって
エジェクタ７を図２に矢印で示すように上方へ向けて突
き上げ動作させると、このエジェクタ７は下型３の孔３
ａを貫通してスクレーパ６の補強支持部材６２の下面に
当突してこれを突き上げ、これによってスクレーパ６
は、芯型２に沿って上方への移動動作を開始する。耐熱
ゴムからなるスクレーパ本体６１の内周面は、芯型２の
外周面に対して適当な締め付け力で密接しているので、
上方への摺動移動に伴って、まずゴム加硫成形品１の下
側で芯型２の軸部２１の外周面に張り付いている薄バリ
１１を削るようにして剥離除去した後、更に成形面２ａ
に抱きついているゴム加硫成形品１の下端に弾性的に当
接してこれを上方へ押圧する。After the mold is opened, when the ejector 7 is pushed up by the push-up cylinder as shown by the arrow in FIG. 2, the ejector 7 is pushed into the hole 3 of the lower die 3.
a and penetrates the lower surface of the reinforcing support member 62 of the scraper 6 and pushes it up, whereby the scraper 6
Starts an operation of moving upward along the core die 2. Since the inner peripheral surface of the scraper body 61 made of heat-resistant rubber is in close contact with the outer peripheral surface of the core mold 2 with an appropriate tightening force,
Along with the sliding movement upward, first, the thin burr 11 attached to the outer peripheral surface of the shaft portion 21 of the core mold 2 on the lower side of the rubber vulcanization molded article 1 is scraped and removed, and then further removed. Forming surface 2a
The lower end of the rubber vulcanization molded product 1 hugged by is elastically abutted and pressed upward.
【００１３】芯型２は、成形面２ａを形成する球状部２
２が大きなアンダカット部分となっており、したがって
ゴム加硫成形品１は離型抵抗が大きい形状となっている
が、ゴム加硫成形品１の下端部に圧接されたスクレーパ
本体６１の内周部は、エジェクタ７によって突き上げら
れる補強支持部材６２の上方移動に伴って芯型２の軸部
２１の外周面を摺動しながら前記ゴム加硫成形品１を下
方から強制的に押し上げ移動させる。このとき、スクレ
ーパ本体６１は、ゴム加硫成形品１との圧接部が適宜変
形されるため、ゴム加硫成形品１に作用する負荷が緩和
される。また、このスクレーパ本体６１は、その内周部
が芯型２の球状部２２の外周位置を摺動する際に、その
球面形状に応じて弾性的に変形されながらゴム加硫成形
品１を押し上げ、これに伴い、前記ゴム加硫成形品１は
球状部２２の外周面に摺接しながら移動され上方へ離型
されるので、球状部２２よりも大径に変形されたりする
ことがない。また、先に述べたように、スクレーパ本体
６１は、芯型２の軸部２１の外周面に張り付いている薄
バリ１１に対する剥離除去機能も有するため、離型後、
ゴム加硫成形品１から薄バリ１１をむしり取るといった
バリ取り工程を不要とすることができる。The core mold 2 has a spherical portion 2 forming a molding surface 2a.
2 is a large undercut portion, and thus the rubber vulcanization molded product 1 has a shape with a large mold release resistance, but the inner circumference of the scraper body 61 pressed against the lower end of the rubber vulcanization molded product 1 The portion slides the outer peripheral surface of the shaft portion 21 of the core mold 2 as the reinforcing support member 62 pushed up by the ejector 7 moves upward, and forcibly pushes up the rubber vulcanization molded product 1 from below. At this time, since the pressure contact portion of the scraper body 61 with the rubber vulcanization molded product 1 is appropriately deformed, the load acting on the rubber vulcanization molded product 1 is alleviated. Further, this scraper body 61 pushes up the rubber vulcanization molded product 1 while being elastically deformed according to the spherical shape of the scraper main body 61 when the inner peripheral part slides on the outer peripheral position of the spherical part 22 of the core die 2. Along with this, the rubber vulcanization molded article 1 is moved while slidingly contacting the outer peripheral surface of the spherical portion 22 and released upward, so that it is not deformed to a larger diameter than the spherical portion 22. In addition, as described above, the scraper body 61 also has a peeling removal function for the thin burr 11 attached to the outer peripheral surface of the shaft portion 21 of the core die 2, so that
It is possible to eliminate the deburring step of stripping the thin burr 11 from the rubber vulcanization molded product 1.
【００１４】上述の実施例においては、スクレーパ６
が、耐熱ゴム製のスクレーパ本体６１の外周部を補強支
持部材６２で挟持した構造となっているが、これを例え
ば図２に他の実施例として示すように、耐熱ゴム製のス
クレーパ本体６１の外周部に補強板６３を埋設一体化し
ても良く、あるいは、ゴム加硫成形品１と芯型２とのア
ンダカット形状による離型抵抗が小さいものの場合は、
スクレーパ６が、耐熱ゴム製のスクレーパ本体６１のみ
からなるものとすることもできる。また、上述の実施例
においては賦形空間Ｃが１個のみのゴム加硫成形用金型
を示したが、複数の賦形空間Ｃを有する多数個取りのゴ
ム加硫成形用金型においても本発明を同様に適用するこ
とができる。In the above embodiment, the scraper 6
Has a structure in which the outer peripheral portion of the scraper body 61 made of heat-resistant rubber is sandwiched by the reinforcing support members 62. As shown in FIG. 2 as another embodiment, for example, as shown in FIG. The reinforcing plate 63 may be embedded and integrated in the outer peripheral portion, or in the case where the release resistance due to the undercut shape of the rubber vulcanization molded product 1 and the core mold 2 is small,
The scraper 6 may be composed of only the scraper body 61 made of heat resistant rubber. Further, in the above-mentioned embodiment, the rubber vulcanization molding die having only one shaping space C is shown, but also in a multi-cavity rubber vulcanization molding die having a plurality of shaping spaces C. The present invention can be similarly applied.
【００１５】[0015]
【発明の効果】本発明に係るゴム加硫成形品の離型装置
によれば、アンダカットによる離型抵抗の大きいゴム加
硫成形品の離型を、人手による手作業に依存することな
く、スクレーパによって短時間で円滑に行うことがで
き、しかも、離型の過程で、ゴム加硫成形品に手作業に
よる離型の場合のような無理な変形による負荷が作用し
ないため、製品品質の安定化を図ることができる。EFFECT OF THE INVENTION According to the apparatus for releasing a rubber vulcanized molded product according to the present invention, the release of a rubber vulcanized molded product having a large release resistance by undercut does not depend on manual work by humans. The scraper can smoothly perform in a short time, and the product quality is stable because the rubber vulcanization molded product is not subjected to an excessive deformation load as in the case of manual mold release during the mold release process. Can be realized.
【図１】本発明に係るゴム加硫成形品の離型装置の一実
施例をゴム加硫成形用金型と共に示す型締め状態の断面
図である。FIG. 1 is a cross-sectional view of a mold vulcanization molded product release apparatus according to an embodiment of the present invention together with a rubber vulcanization molding die in a mold clamped state.
【図２】上記実施例を型開き後の状態で示す断面図であ
る。FIG. 2 is a cross-sectional view showing the above embodiment in a state after mold opening.
【図３】本発明に係るゴム加硫成形品の離型装置の他の
実施例を型開き後の状態で示す断面図である。FIG. 3 is a cross-sectional view showing another embodiment of the apparatus for releasing a rubber vulcanization molded product according to the present invention after the mold is opened.
【図４】アンダカットを有するゴム加硫成形品及びその
成形後の型開き状態を示す説明図である。FIG. 4 is an explanatory view showing a rubber vulcanization molded product having an undercut and a mold opening state after the molding.
１ ゴム加硫成形品 ２ 芯型 ２ａ 成形面 ２１ 軸部 ２２ 球状部 ３ 下型 ３ａ 孔 ４ 上型 ５ 中型 ６ スクレーパ ６１ スクレーパ本体 ６２ 補強支持部材 ６３ 補強板 ７ エジェクタ（移動手段） Ｃ 賦形空間 1 Rubber Vulcanization Molded Product 2 Core Mold 2a Molding Surface 21 Shaft Part 22 Spherical Part 3 Lower Mold 3a Hole 4 Upper Mold 5 Medium Size 6 Scraper 61 Scraper Main Body 62 Reinforcement Support Member 63 Reinforcement Plate 7 Ejector (Movement) C Shaped Space
Claims (1)
（１）が抱き付いた状態に成形される芯型（２）の前記
成形面（２ａ）側へ向けてスクレーパ（６）が軸方向移
動自在に配置され、 このスクレーパ（６）は、内周面が前記芯型（２）の成
形面（２ａ）を含む外周面に対して拡縮径自在に摺接さ
れる耐熱ゴム製のスクレーパ本体（６１）を備えること
を特徴とするゴム加硫成形品の離型装置。1. A scraper (6) directed toward the molding surface (2a) side of a core mold (2) molded in a state in which a rubber vulcanization molded product (1) is clung to the molding surface (2a) of the outer periphery. Is disposed so as to be movable in the axial direction, and the scraper (6) is made of a heat-resistant rubber whose inner peripheral surface is slidably contacted with the outer peripheral surface including the molding surface (2a) of the core die (2) so as to be able to expand and contract. A device for releasing a rubber vulcanization molded article, which comprises the scraper body (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33745994A JPH08183038A (en) | 1994-12-28 | 1994-12-28 | Release device for rubber vulcanized molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33745994A JPH08183038A (en) | 1994-12-28 | 1994-12-28 | Release device for rubber vulcanized molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08183038A true JPH08183038A (en) | 1996-07-16 |
Family
ID=18308843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33745994A Withdrawn JPH08183038A (en) | 1994-12-28 | 1994-12-28 | Release device for rubber vulcanized molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08183038A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7713603B2 (en) | 2005-10-28 | 2010-05-11 | Vitec, Llc | Molded article method, and apparatus for providing an undercut molding feature in a mold tool |
| JP2021014046A (en) * | 2019-07-11 | 2021-02-12 | キタノ製作株式会社 | Molding method and molding die |
-
1994
- 1994-12-28 JP JP33745994A patent/JPH08183038A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7713603B2 (en) | 2005-10-28 | 2010-05-11 | Vitec, Llc | Molded article method, and apparatus for providing an undercut molding feature in a mold tool |
| JP2021014046A (en) * | 2019-07-11 | 2021-02-12 | キタノ製作株式会社 | Molding method and molding die |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020305 |