JP2000084953A - Method for molding rubber molding and mold - Google Patents
Method for molding rubber molding and moldInfo
- Publication number
- JP2000084953A JP2000084953A JP25956098A JP25956098A JP2000084953A JP 2000084953 A JP2000084953 A JP 2000084953A JP 25956098 A JP25956098 A JP 25956098A JP 25956098 A JP25956098 A JP 25956098A JP 2000084953 A JP2000084953 A JP 2000084953A
- Authority
- JP
- Japan
- Prior art keywords
- thin
- molding
- burr
- product
- cut
- 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.)
- Granted
Links
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、パッキン等のゴム
成形品を成形するゴム成形品の成形方法と、その成形型
とに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a rubber molded article for molding a rubber molded article such as a packing, and a mold for molding the same.
【０００２】[0002]
【従来の技術】例えば図６に示すように、ゴム状弾性材
製のパッキン５１を成形型５２により成形する場合に
は、成形材料の注入時に成形材料が製品キャビティ空間
５３の末端部まで洩れなく行き渡るように、この末端部
に連続してバリ溝５４が形成されている。したがって成
形直後の成形品には製品部５５に対してバリ部５６が一
体成形されており、これらを一体のまま離型させてから
製品部５５とバリ部５６とを分離する。またこの分離を
容易化するため、製品部５５とバリ部５６との間に薄肉
切断部５７が同時に成形され、バリ部５６を引っ張った
ときにこの薄肉切断部５７が切断される。2. Description of the Related Art As shown in FIG. 6, for example, when a packing 51 made of rubber-like elastic material is molded by a molding die 52, the molding material does not leak to the end of a product cavity space 53 when the molding material is injected. A burr groove 54 is formed continuously at this end so as to be widespread. Therefore, in the molded product immediately after molding, the burr portion 56 is integrally formed with the product portion 55, and the product portion 55 and the burr portion 56 are separated after releasing these as one. Further, in order to facilitate this separation, a thin cut portion 57 is simultaneously formed between the product portion 55 and the burr portion 56, and the thin cut portion 57 is cut when the burr portion 56 is pulled.
【０００３】しかしながら、この薄肉切断部５７の厚さ
を適切に設定するのは、なかなが困難である。すなわち
この薄肉切断部５７の厚さが厚過ぎると、製品部５５と
バリ部５６とを分離するときに切断箇所が薄肉切断部５
７に特定されず、製品部５５が切断されて傷のある不良
品が発生したり、またはバリ部５６が切断されてバリ残
りのある不良品が発生したりする（バリ毟り性の不
良）。また反対に、薄肉切断部５７の厚さが薄過ぎる
と、離型時に早くも薄肉切断部５７が切断されてしま
い、製品部５５、薄肉切断部５７およびバリ部５６を一
体に備えた成形品を纏めて離型させることができない
（離型性の不良）。However, it is quite difficult to properly set the thickness of the thin cut portion 57. That is, if the thickness of the thin cut portion 57 is too large, the cut portion is separated from the thin cut portion 5 when the product portion 55 and the burr portion 56 are separated.
7, the product portion 55 is cut to generate a defective product with a flaw, or the burr portion 56 is cut to generate a defective product with a remaining burr (poor burr tearing property). On the other hand, if the thickness of the thin-walled cut portion 57 is too thin, the thin-walled cut portion 57 will be cut as soon as the mold is released, and the molded product integrally includes the product portion 55, the thin-walled cut portion 57, and the burr portion 56. Cannot be released collectively (poor release properties).
【０００４】[0004]
【発明が解決しようとする課題】本発明は以上の点に鑑
み、製品部とバリ部とを分離するときに切断箇所を正確
に薄肉切断部に特定することができ、もってバリ毟り性
を向上させることが可能であるとともに、離型時に薄肉
切断部が切断されることがなく、製品部、薄肉切断部お
よびバリ部を一体に備えた成形品を纏めて離型させるこ
とができ、もって離型性を向上させることが可能なゴム
成形品の成形方法とその成形型とを提供することを目的
とする。SUMMARY OF THE INVENTION In view of the above points, the present invention can accurately specify a cut portion as a thin cut portion when separating a product portion and a burr portion, thereby improving burr tearing properties. In addition, the thin cut portion is not cut at the time of release from the mold, and the molded product integrally including the product portion, the thin cut portion, and the burr portion can be released from the mold. It is an object of the present invention to provide a method for molding a rubber molded article capable of improving moldability and a molding die thereof.
【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、本発明の請求項１によるゴム成形品の成形方法は、
製品部に薄肉切断部を介してバリ部を一体成形し、離型
後に前記製品部と前記バリ部とを分離するゴム成形品の
成形方法において、前記薄肉切断部の一部に前記薄肉切
断部の他の部分より肉厚が薄い薄肉部を成形するととも
に、前記薄肉部に対応して前記バリ部に突部を一体成形
し、前記突部を力点にして前記製品部と前記バリ部とを
分離することにした。To achieve the above object, a method for molding a rubber molded product according to claim 1 of the present invention comprises:
In a method of molding a rubber molded product, in which a burr portion is integrally formed on a product portion via a thin cut portion, and the product portion and the burr portion are separated after release, the thin cut portion is partially formed on the thin cut portion. A thin portion having a smaller thickness than other portions is formed, and a protrusion is integrally formed on the burr portion corresponding to the thin portion, and the product portion and the burr portion are formed with the protrusion as a power point. I decided to separate.
【０００６】また、本発明の請求項２によるゴム成形品
の成形方法は、上記した請求項１のゴム成形品の成形方
法において、一体に連なる製品部、薄肉切断部およびバ
リ部を複数組備えたシート状の成形品を成形するととも
に前記成形品をシート状のまま成形型から離型させる工
程を有し、前記成形品を前記成形型から離型させるとき
に力を加える方向と、各製品部における薄肉部および突
部の配置方向との間に所定の角度を設定することにし
た。According to a second aspect of the present invention, there is provided a method of molding a rubber molded product according to the first aspect of the present invention, wherein a plurality of sets of a product part, a thin cut part, and a burr part are integrally connected. Forming a sheet-like molded product, and releasing the molded product from the molding die in the form of a sheet, and applying a force when releasing the molded product from the molding die; A predetermined angle is set between the thin portion and the arrangement direction of the protrusion in the portion.
【０００７】また、本発明の請求項３による成形型は、
上記した請求項１または２の成形方法の実施に使用され
る成形型であって、薄肉部を成形する成形部が、薄肉切
断部を成形する成形部の一部に設けられるとともに、突
部を成形する成形部が、前記薄肉部を成形する成形部に
対応してかつバリ部を成形する成形部に連続してパーテ
ィング部に設けられていることにした。[0007] A molding die according to claim 3 of the present invention comprises:
A molding die used for carrying out the molding method according to claim 1 or 2, wherein a molding part for molding a thin part is provided in a part of a molding part for molding a thin cut part, and a projection is formed. The forming part to be formed is provided on the parting part corresponding to the forming part for forming the thin part and continuing to the forming part for forming the burr part.
【０００８】上記構成を備えた本発明の請求項１による
成形方法によれば、切断箇所を特定するために製品部と
バリ部との間に成形される薄肉切断部に、その肉厚が比
較的薄い薄肉部と、その肉厚が比較的厚い他の部分とが
併せて成形される。According to the molding method of the present invention having the above-described structure, the thickness of the thin cut portion formed between the product portion and the burr portion in order to specify the cut portion is compared with that of the thin cut portion. An extremely thin portion and another portion having a relatively large thickness are formed together.
【０００９】したがって先ず、前者の肉厚の比較的薄い
薄肉部が設けられることにより、この薄肉部が製品部と
バリ部とを分離するときの切断の起点ないし始点とな
り、この薄肉部から他の部分に沿って切断が順次進行す
る。またこの薄肉部の配置に対応して突部がバリ部に一
体成形されるために、製品部とバリ部とを分離するとき
にバリ部の何処を引っ張れば良いかを一目で知ることが
でき、しかもこの突部を撮んでこれを引っ張れば良いこ
とから作業性を向上させることができる（バリ毟り性の
向上）。Therefore, first, by providing the former relatively thin portion, the thin portion serves as a starting point or a starting point of cutting when separating the product portion and the burr portion, and other thin portions are separated from the thin portion. Cutting proceeds sequentially along the portion. In addition, since the protrusion is integrally formed with the burr part corresponding to the arrangement of the thin part, it is possible to know at a glance where to pull the burr part when separating the product part and the burr part. In addition, since it is sufficient to take the projection and pull it, workability can be improved (improvement of burr tearing).
【００１０】また、後者の肉厚の比較的厚い他の部分が
設けられることにより、この他の部分の強度が比較的大
きく、よって離型時に薄肉切断部が切断されるのを防止
することができる（離型性の向上）。Further, since the other portion having the relatively large thickness is provided, the strength of the other portion is relatively large, so that it is possible to prevent the thin cut portion from being cut at the time of release from the mold. Yes (improves mold release).
【００１１】また、上記構成を備えた本発明の請求項２
による成形方法のように、ゴム成形品が多数個取りされ
るものであって、一体に連なる製品部、薄肉切断部およ
びバリ部を複数組備えたシート状の成形品を成形すると
ともにこの成形品をシート状のまま成形型から離型させ
る工程を有する場合には、この成形品を成形型から離型
させるときに力を加える方向と、各製品部における薄肉
部および突部の配置方向との間に所定の角度を設定する
のが好適であり、これによりシート状の成形品を成形型
から離型させるときに薄肉切断部がその薄肉部から切断
されてしまうのを防止することができる。これは、シー
ト状の成形品を成形型から離型させるときに力を加える
方向と各製品部における薄肉部および突部の配置方向と
が角度的に合致していると、薄肉部が他の部分より先に
成形型から離れる配置となって薄肉部が切断され易いの
に対して、他の部分の少なくとも一部が薄肉部より先に
成形型から離れるようにし、これに続いて薄肉部が比較
的容易に成形型から離れるようにしたものである。尚、
前者のシート状の成形品を成形型から離型させるときに
力を加える方向は、これを換言すれば、シート状の成形
品を成形型から引き剥す方向である。Further, the present invention has the above-mentioned structure.
Is a method in which a large number of rubber molded articles are taken out as in the molding method according to the above, and a sheet-shaped molded article including a plurality of sets of a product part, a thin-walled cut part, and a burr part that are integrally connected is formed. In the case of having a step of releasing the molded product from the molding die in the form of a sheet, the direction in which a force is applied when the molded product is released from the molding die, and the arrangement direction of the thin portion and the projection in each product portion It is preferable to set a predetermined angle between the thin-walled portions, and this can prevent the thin-walled cut portion from being cut from the thin-walled portion when the sheet-like molded product is released from the molding die. This is because if the direction in which the force is applied when the sheet-like molded product is released from the mold and the direction in which the thin portions and the protrusions are arranged in each product portion are angularly coincident, the thin portions will be in other positions. While the thin portion is easy to be cut away from the molding die before the portion, at least a part of the other portion is separated from the molding die before the thin portion, and subsequently the thin portion is It is relatively easy to separate from the mold. still,
The direction in which force is applied when the former sheet-like molded product is released from the molding die is, in other words, the direction in which the sheet-like molded product is peeled off from the molding die.
【００１２】また請求項３に示すように、本発明の各方
法の実施に使用される成形型には、製品部を成形する製
品部、薄肉切断部を成形する成形部、およびバリ部を成
形する成形部が分割型のパーティング部に設けられる他
に、薄肉部を成形する成形部が、薄肉切断部を成形する
成形部の一部に設けられるとともに、突部を成形する成
形部が、薄肉部を成形する成形部に対応しかつバリ部を
成形する成形部に連続してパーティング部に設けられる
ことになる。[0012] As described in claim 3, a molding die used for carrying out each method of the present invention includes a product part for molding a product part, a molding part for molding a thin cut part, and a burr part. In addition to the forming part to be provided in the parting part of the split mold, the forming part for forming the thin part is provided in a part of the forming part for forming the thin cut part, and the forming part for forming the protrusion, The parting part is provided in the parting part corresponding to the forming part for forming the thin part and continuing to the forming part for forming the burr part.
【００１３】[0013]
【発明の実施の形態】つぎに本発明の実施形態を図面に
したがって説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.
【００１４】図１に示すように、当該実施形態に係る成
形方法は、ゴム成形品の一種であるゴム状弾性材製のパ
ッキン１を成形型２１を使用して成形するものである。
成形型２１は、上型２２と、この上型２２に対して接離
可能に組み合わされた下型２３と、この下型２３に対し
て上下方向に相対移動可能に組み合わされた中型２４と
を備えており、これらの分割型を組み合わせることによ
って、パッキン１となる製品部２、薄肉切断部５，７，
９およびバリ部６，８，１０を一体に備えた成形品を成
形する。As shown in FIG. 1, the molding method according to the present embodiment is to form a packing 1 made of a rubber-like elastic material, which is a kind of rubber molded product, using a molding die 21.
The molding die 21 includes an upper die 22, a lower die 23 that is combined with the upper die 22 so as to be able to approach and separate from the upper die 22, and a middle die 24 that is combined with the lower die 23 so as to be relatively movable in the vertical direction. By combining these split molds, the product part 2 serving as the packing 1 and the thin cut parts 5, 7,
A molded article integrally including the burrs 9 and the burrs 6, 8, and 10 is formed.
【００１５】図２に拡大して示すように、パッキン１は
断面略Ｕ字形を呈するＵパッキンであって、環状を呈す
る内向きの第一リップ３および第二リップ４を一体に備
えており、図上上側の第一リップ３の内周側に第一薄肉
切断部５を介して第一バリ部６が一体成形され、同じ第
一リップ３の外周側に第二薄肉切断部７を介して第二バ
リ部８が一体成形され、図上下側の第二リップ４の内周
側に第三薄肉部９を介して第三バリ部１０が一体成形さ
れる。図３は図２のＡ方向矢視図であり、図２はこの図
３のＢ−Ｂ線拡大断面図である。As shown in FIG. 2 in an enlarged manner, the packing 1 is a U-packing having a substantially U-shaped cross section, and integrally includes an inward first lip 3 and a second lip 4 having an annular shape. A first burr portion 6 is integrally formed on the inner peripheral side of the first lip 3 on the upper side of the figure via a first thin cut portion 5, and on the outer peripheral side of the same first lip 3 via a second thin cut portion 7. The second burr portion 8 is integrally formed, and the third burr portion 10 is integrally formed via the third thin portion 9 on the inner peripheral side of the second lip 4 on the upper and lower sides in the figure. FIG. 3 is a view taken in the direction of arrow A in FIG. 2, and FIG. 2 is an enlarged sectional view taken along line BB of FIG.
【００１６】第一薄肉切断部５は、第一リップ３の内周
側に環状に一体成形され、全周に亙って均一な厚さを備
えるように成形される。第一バリ部６は第一薄肉切断部
５の内周側に一体成形され、比較的厚肉の環状部６ａと
比較的薄肉の膜状の平面部６ｂとを一体に備えるように
成形される。第二薄肉切断部７は第一リップ３の内周側
に環状に一体成形され、全周に亙って均一な厚さを備え
るように成形される。第二バリ部８は第二薄肉切断部７
の外周側に一体成形され、比較的厚肉の環状部８ａと比
較的薄肉の膜状の平面部８ｂとを一体に備えるように成
形される。The first thin cut portion 5 is integrally formed in an annular shape on the inner peripheral side of the first lip 3, and is formed so as to have a uniform thickness over the entire circumference. The first burr portion 6 is integrally formed on the inner peripheral side of the first thin cut portion 5, and is formed so as to integrally include a relatively thick annular portion 6a and a relatively thin film-shaped flat portion 6b. . The second thin cut portion 7 is integrally formed in an annular shape on the inner peripheral side of the first lip 3, and is formed so as to have a uniform thickness over the entire circumference. The second burr 8 is the second thin cut 7
Is formed integrally with the outer peripheral side of the base member so as to integrally include a relatively thick annular portion 8a and a relatively thin film-shaped flat portion 8b.
【００１７】第三薄肉切断部９は、第二リップ４の内周
側に環状に一体成形され、その円周上の一部に、その厚
さｔ２を他の部分９ａの厚さｔ１より薄く成形される薄
肉部９ｂが所定の角度範囲θに亙って設けられる。角度
範囲θの大きさは３０〜９０度程度とするが、特に６０
度ないし６０度前後が好適である。薄肉部９ｂはバリ毟
り時に製品部２と第三バリ部１０とを容易に分離できる
厚さを備えており、これより厚い他の部分９ａは製品部
２と第三バリ部１０とを一体で離型できる厚さを備えて
いる。The third thin cutting unit 9 is integrally molded on the annular inner peripheral side of the second lip 4, on a part of its circumference, the thickness t 1 of the thickness t 2 other portions 9a A thin portion 9b that is formed thinner is provided over a predetermined angle range θ. The size of the angle range θ is about 30 to 90 degrees,
About 60 degrees is preferable. The thin portion 9b has a thickness that allows the product portion 2 and the third burr portion 10 to be easily separated at the time of burr tearing, and the other portion 9a thicker than this has the product portion 2 and the third burr portion 10 integrally. It has a thickness that can be released.
【００１８】第三バリ部１０は、第三薄肉切断部９の内
周側に環状に一体成形され、その内周側であって円周上
の一部に、突起状ないし舌片状を呈する突部１１が第三
薄肉切断部９における薄肉部９ｂの角度範囲θの中央に
位置して内向きに一体成形される。The third burr portion 10 is integrally formed in an annular shape on the inner peripheral side of the third thin cut portion 9, and has a protruding or tongue-like shape on a part of the inner peripheral side and on the circumference. The protrusion 11 is located at the center of the angle range θ of the thin portion 9b in the third thin cut portion 9 and is integrally formed inward.
【００１９】また図４に示すように、パッキン１は多数
個取りされるものであって、上記したように一体に連な
る製品部２、薄肉切断部５，７，９、バリ部６，８，１
０および突部１１を多数組（図では７個２列で計１４
個）備えたシート状の成形品１２として成形される。各
パッキン１においては、第一バリ部６、第一薄肉切断部
５、第一リップ３、第二薄肉切断部７および第二バリ部
８が同一平面上に配置されてこれらによって平面状のシ
ート体が成形され、この平面状のシート体に対して第二
リップ４、第三薄肉切断部９、第三バリ部１０および突
部１１が厚さ方向に立体成形される。シート全体の基板
を成す第二バリ部８の平面部８ｂには、補強用のリブ８
ｃが格子状に一体成形される。As shown in FIG. 4, a plurality of packings 1 are formed, and the product part 2, the thin cut parts 5, 7, 9 and the burr parts 6, 8, and 1
0 and a large number of protrusions 11 (in the figure, 14
) Is formed as a sheet-like molded product 12. In each packing 1, the first burr portion 6, the first thin cut portion 5, the first lip 3, the second thin cut portion 7, and the second burr portion 8 are arranged on the same plane, and these are used to form a flat sheet. The body is formed, and the second lip 4, the third thin cut part 9, the third burr part 10, and the protrusion 11 are three-dimensionally formed in the thickness direction with respect to the flat sheet body. Reinforcing ribs 8 are provided on the flat portion 8b of the second burr portion 8 forming the substrate of the entire sheet.
c is integrally formed in a lattice shape.
【００２０】また、このシート状の成形品１２は、図５
に示すように、その長手方向の一端部１２ａを指３１で
掴んで引っ張ることにより離型時に下型２３から引き剥
される。したがってこの成形品１２を成形型２１から引
き剥す方向はその長手方向（図上Ｃ方向）であり、この
引き剥し方向Ｃに対して、各パッキン１における薄肉部
９ｂおよび突部１１の円周上の配置が角度的に９０度な
いし９０度前後ずれて設定される。これは、シート状の
成形品１２を成形型２１から引き剥すときに第三薄肉切
断部９がその薄肉部９ｂから早々に切断されるのを防止
するためである。The sheet-like molded product 12 is shown in FIG.
As shown in (1), the one end portion 12a in the longitudinal direction is gripped by the finger 31 and pulled to be peeled off from the lower mold 23 at the time of release. Therefore, the direction in which the molded product 12 is peeled off from the molding die 21 is the longitudinal direction (direction C in the drawing), and with respect to the peeling direction C, the circumferential direction of the thin portion 9 b and the protrusion 11 in each packing 1. Are set to be angularly shifted from 90 degrees to about 90 degrees. This is to prevent the third thin cut portion 9 from being cut from the thin portion 9b prematurely when the sheet-like molded product 12 is peeled off from the mold 21.
【００２１】上記パッキン１を成形するに際しては、先
ず図１に示したように成形型２１のパーティング部に設
けられた製品部２を成形する成形部（製品キャビティ空
間とも称する）２５、薄肉切断部５，７，９を成形する
成形部（隙間とも称する）２６、バリ部６，８，１０を
成形する成形部（バリ溝とも称する）２７および突部１
１を成形する成形部２８に成形材料を洩れなく注入して
加硫成形を行ない、次いで型開きおよび離型を行ない、
図２に示したような成形品を成形する。離型は第二リッ
プ４を下型２３から引き剥すように行なうものである。
次いで、製品部２の内周側に一体成形された突部１１を
指で撮んで強く引っ張ると、第三薄肉切断部９が先ず薄
肉部９ｂで切断され、次いで他の部分９ａに沿って切断
され、第三薄肉部９が全周に亙って切断される。したが
ってこれにより第三バリ部１０を製品部２から引きちぎ
ることができ、しかも切断が薄肉部９ｂを起点ないし始
点として確実に第三薄肉切断部９で行なわれるために、
切断箇所を正確に第三薄肉切断部９に特定することがで
きる。When the packing 1 is formed, first, as shown in FIG. 1, a forming part (also referred to as a product cavity space) 25 for forming the product part 2 provided in the parting part of the forming die 21, a thin-wall cutting. Forming part (also referred to as a gap) 26 for forming parts 5, 7, 9; forming part (also referred to as a burr groove) 27 for forming burr parts 6, 8, 10;
The vulcanization molding is performed by injecting the molding material into the molding section 28 for molding 1 without leakage, and then the mold is opened and the mold is released.
A molded article as shown in FIG. 2 is molded. The release is performed such that the second lip 4 is peeled off from the lower die 23.
Next, when the protrusion 11 integrally formed on the inner peripheral side of the product part 2 is photographed with a finger and strongly pulled, the third thin cut part 9 is first cut at the thin part 9b, and then cut along the other part 9a. Then, the third thin portion 9 is cut over the entire circumference. Accordingly, the third burr section 10 can be torn off from the product section 2 and the cutting can be reliably performed at the third thin section 9 with the thin section 9b as a starting point or a starting point.
The cut portion can be accurately specified to the third thin cut portion 9.
【００２２】また、第三薄肉切断部９において、他の部
分９ａはその厚さｔ１が比較的厚く成形されているため
に、この部分９ａはその強度が比較的大きなものであ
る。したがって離型時に第三薄肉切断部９が早々に切断
されることがなく、よって製品部２、第三薄肉切断部
９、第三バリ部１０および突部１１を一体に備えた成形
品を纏めて離型させることができ、離型性を向上させる
ことができる。Further, in the third thin cutting unit 9, the other portion 9a is to its thickness t 1 is relatively thick molded, this portion 9a its strength is relatively large. Therefore, the third thin-walled cut portion 9 is not prematurely cut at the time of release from the mold, so that a molded product integrally including the product portion 2, the third thin-walled cut portion 9, the third burr portion 10, and the protrusion 11 is put together. And release can be performed, and the releasability can be improved.
【００２３】尚、第一および第二バリ部６，８について
は、通常どおりの手順で第一および第二薄肉切断部５，
７を切断し、これらを製品部２から分離する。The first and second burrs 6 and 8 are processed in the same manner as usual.
7 are cut off and separated from the product section 2.
【００２４】また、成形型２１には、上記したように製
品部２を成形する成形部２５、薄肉切断部５，７，９を
成形する成形部２６、バリ部６，８，１０を成形する成
形部２７、および突部１１を成形する成形部２８の他
に、薄肉部９ｂを成形する成形部２６ｂが薄肉切断部９
を成形する成形部２６の一部に設けられる。また突部１
１を成形する成形部２８は、薄肉部９ｂを成形する成形
部２６ｂの配置に対応してかつ第三バリ部１０を成形す
る成形部２７に連続して成形型２１のパーティング部
（下型２３の上面）に設けられる。As described above, the forming part 25 for forming the product part 2, the forming part 26 for forming the thin-walled cut parts 5, 7, 9 and the burr parts 6, 8, 10 are formed in the forming die 21 as described above. In addition to the forming part 27 and the forming part 28 for forming the protrusion 11, the forming part 26b for forming the thin part 9b is formed by the thin cutting part 9
Is formed in a part of the molding part 26 for molding the slab. Also protrusion 1
The molding part 28 for molding the molding part 1 corresponds to the arrangement of the molding part 26b for molding the thin part 9b and is continuous with the molding part 27 for molding the third burr part 10. 23).
【００２５】上記内容ないし手順を備えた当該製造方法
によれば、以下の作用効果を奏することが可能である。According to the manufacturing method having the above contents or procedure, the following effects can be obtained.
【００２６】すなわち先ず第一に、製品部２における第
二リップ４とその内周側の第三バリ部１０との間に成形
される第三薄肉切断部９に、その肉厚が比較的薄い薄肉
部９ｂと、肉厚が比較的厚い他の部分９ａとが併せて成
形されるために、先ず、肉厚の比較的薄い薄肉部９ｂが
第三バリ部１０を引きちぎるときの切断の起点ないし始
点となり、この薄肉部９ｂから他の部分９ａに沿って切
断が順次進行する。したがって製品部２から第三バリ部
１０を引きちぎるときに切断箇所を正確に第三薄肉切断
部９に特定することができ、従来のように製品部２が切
断されて傷のある不良品が発生したり、またはバリ部１
０が切断されてバリ残りのある不良品が発生したりする
のを防止することができる。またこの薄肉部９ｂの配置
に対応して突部１１が第三バリ部１０に一体成形される
ために、第三バリ部１０を引きちぎるときにバリ部１０
の何処を引っ張れば良いかが明確に表示され、これを正
確に特定することができ、しかもこの突部１１を撮んで
これを引っ張れば良いことから作業性を向上させること
ができる。That is, first, the third thin cut portion 9 formed between the second lip 4 of the product portion 2 and the third burr portion 10 on the inner peripheral side thereof has a relatively small thickness. Since the thin portion 9b and the other portion 9a having a relatively large thickness are formed together, first, the starting point or the starting point of cutting when the relatively thin portion 9b tears off the third burr portion 10 As a starting point, cutting proceeds sequentially from the thin portion 9b to another portion 9a. Therefore, when the third burr portion 10 is torn off from the product portion 2, the cut portion can be accurately specified to the third thin cut portion 9, and the product portion 2 is cut as in the conventional case, and defective products with scratches are generated. Or burr part 1
It is possible to prevent the occurrence of defective products having zero burrs and remaining burrs. In addition, since the projection 11 is integrally formed with the third burr portion 10 corresponding to the arrangement of the thin portion 9b, the burr portion 10 is torn when the third burr portion 10 is torn.
It is clearly displayed where it should be pulled, and it can be specified accurately. Moreover, since it is sufficient to take the projection 11 and pull it, the workability can be improved.
【００２７】また、肉厚の比較的厚い他の部分９ａが併
せて設けられることにより、この他の部分９ａの強度が
比較的大きく、よって離型時に第三薄肉切断部９が切断
されるのを防止することができる。Further, since the other portion 9a having a relatively large thickness is additionally provided, the strength of the other portion 9a is relatively large, so that the third thin cut portion 9 is cut when the mold is released. Can be prevented.
【００２８】また、パッキン１が多数個取りされるもの
であって、製品部２、第三薄肉切断部９、第三バリ部１
０および突部１１を複数組備えたシート状の成形品１２
を成形するとともにこの成形品１２をシート状のまま成
形型２１から引き剥す場合にシート状の成形品１２を成
形型２１から引き剥す方向Ｃと、各製品部２における薄
肉部９ｂおよび突部１１の配置とを角度的にずらして設
定することにより、シート状の成形品１２を成形型２１
から引き剥すときに第三薄肉切断部９がその薄肉部９ｂ
から切断されてしまうのを未然に防止することができ
る。したがってこれによっても成形品の離型性を向上さ
せることができる。Also, a plurality of packings 1 are taken, and the product part 2, the third thin cut part 9, the third burr part 1
Sheet-shaped molded product 12 provided with a plurality of sets 0 and protrusions 11
When the molded article 12 is peeled off from the molding die 21 in the form of a sheet, the direction C in which the sheet-shaped molded article 12 is peeled off from the molding die 21, the thin portion 9 b and the projection 11 in each product part 2. Of the sheet-like molded product 12 by molding the mold 21
When peeled from the third thin-walled cut portion 9 is the thin-walled portion 9b
Can be prevented from being disconnected. Accordingly, the mold releasability of the molded article can also be improved by this.
【００２９】[0029]
【発明の効果】本発明は、以下の効果を奏する。The present invention has the following effects.
【００３０】すなわち先ず、上記構成を備えた本発明の
請求項１によるゴム成形品の成形方法においては、製品
部とバリ部との間に成形される薄肉切断部に、その肉厚
が比較的薄い薄肉部と、肉厚が比較的厚い他の部分とが
併せて成形されるために、先ず、肉厚の比較的薄い薄肉
部が製品部とバリ部とを分離するときの切断の起点ない
し始点となり、この薄肉部から他の部分に沿って切断が
順次進行する。したがって製品部とバリ部とを分離する
ときに切断箇所を正確に薄肉切断部に特定することがで
き、従来のように製品部が切断されて傷のある不良品が
発生したり、またはバリ部が切断されてバリ残りのある
不良品が発生したりするのを防止することができる。ま
た薄肉部の配置に対応して突部がバリ部に一体成形され
るために製品部とバリ部とを分離するときにバリ部の何
処を引っ張れば良いかを一目で知ることができ、しかも
この突部を撮んでこれを引っ張れば良いことから作業性
を向上させることができる（バリ毟り性の向上）。First, in the method of molding a rubber molded product according to the first aspect of the present invention having the above-described structure, the thickness of the thin cut portion formed between the product portion and the burr portion is relatively small. Since the thin part and the other part having a relatively large thickness are formed together, first, the starting point or the starting point of the cutting when the relatively thin part is separated from the product part and the burr part. It becomes a starting point, and cutting proceeds sequentially from this thin portion to another portion. Therefore, when the product portion and the burr portion are separated, the cut portion can be accurately specified as the thin-walled cut portion. Can be prevented from being cut and defective products with burrs remaining can be generated. In addition, since the protrusion is formed integrally with the burr portion corresponding to the arrangement of the thin portion, it is possible to know at a glance where to pull the burr portion when separating the product portion and the burr portion, and Since it is sufficient to take the projection and pull it, the workability can be improved (improvement of burr tearing).
【００３１】また、肉厚の比較的厚い他の部分が併せて
設けられることにより、この他の部分の強度が比較的大
きく、よって離型時に薄肉切断部が切断されるのを防止
することができる（離型性の向上）。Further, since another portion having a relatively large thickness is additionally provided, the strength of the other portion is relatively large, so that it is possible to prevent the thin cut portion from being cut at the time of mold release. Yes (improves mold release).
【００３２】またこれに加えて、上記構成を備えた本発
明の請求項２によるゴム成形品の成形方法においては、
ゴム成形品が多数個取りされるものであって、一体に連
なる製品部、薄肉切断部およびバリ部を複数組備えたシ
ート状の成形品を成形するとともにこの成形品をシート
状のまま成形型から離型させる工程を有する場合に、こ
の成形品を成形型から離型させるときに力を加える方向
と、各製品部における薄肉部および突部の配置方向との
間に所定の角度を設定することにより、シート状の成形
品を成形型から離型させるときに薄肉切断部がその薄肉
部から切断されてしまうのを未然に防止することができ
る。したがってこれによっても成形品の離型性を向上さ
せることができる。In addition to the above, in the method for molding a rubber molded product according to the second aspect of the present invention having the above structure,
A large number of rubber molded articles are taken out, and a sheet-shaped molded article provided with a plurality of sets of a product part, a thin-walled cut part, and a burr part which are integrally connected, and the molded article is formed as a sheet-shaped mold When there is a step of releasing the molded product from the molding die, a predetermined angle is set between the direction in which a force is applied when the molded product is released from the molding die and the arrangement direction of the thin portions and the projections in each product portion. Thus, it is possible to prevent the thin cut portion from being cut from the thin portion when the sheet-like molded product is released from the mold. Accordingly, the mold releasability of the molded article can also be improved by this.
【００３３】また請求項３によれば、上記した請求項１
または２による成形方法の実施に使用されるのに適した
成形型を提供することができる。Further, according to claim 3, the above-mentioned claim 1 is provided.
Or a mold suitable for use in carrying out the molding method according to 2.
【図１】本発明の実施形態に係る成形方法の実施に使用
される成形型の要部断面図FIG. 1 is a sectional view of a main part of a molding die used for performing a molding method according to an embodiment of the present invention.
【図２】本発明の実施形態に係る成形方法により成形さ
れる成形品の要部断面図FIG. 2 is a cross-sectional view of a main part of a molded product molded by a molding method according to an embodiment of the present invention.
【図３】図２におけるＡ方向矢視図FIG. 3 is a view in the direction of arrow A in FIG. 2;
【図４】シート状成形品の底面図FIG. 4 is a bottom view of a sheet-like molded product.
【図５】シート状成形品を成形型から引き剥す工程の説
明図FIG. 5 is an explanatory diagram of a step of peeling a sheet-like molded product from a molding die.
【図６】従来例に係る製造方法の実施に使用される成形
型の要部断面図FIG. 6 is a sectional view of a main part of a molding die used for performing a manufacturing method according to a conventional example.
１ パッキン（ゴム成形品） ２ 製品部 ３，４ リップ ５，７，９ 薄肉切断部 ６，８，１０ バリ部 ６ａ，８ａ 環状部 ６ｂ，８ｂ 平面部 ８ｃ リブ ９ａ 他の部分 ９ｂ 薄肉部 １１ 突部 １２ シート状成形品 １２ａ 一端部 ２１ 成形型 ２２ 上型 ２３ 下型 ２４ 中型 ２５，２６，２６ｂ，２７，２８ 成形部 ３１ 指 DESCRIPTION OF SYMBOLS 1 Packing (rubber molded article) 2 Product part 3,4 Lip 5,7,9 Thin cut part 6,8,10 Burr part 6a, 8a Ring part 6b, 8b Flat part 8c Rib 9a Other parts 9b Thin part 11 protrusion Part 12 Sheet-shaped molded product 12a One end 21 Molding die 22 Upper die 23 Lower die 24 Middle die 25, 26, 26b, 27, 28 Molding part 31 Finger
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ２９Ｋ 105:24 Ｆターム(参考） 4F201 AA45 AG21 AG28 AH13 BA08 BC01 BC02 BC12 BC15 BC17 BD02 BM07 BS02 4F202 AA45 AG21 AG28 AH13 CA09 CB01 CK85 CK87 CK89 4F203 AA45 AG21 AG28 AH13 DA03 DB01 DH19 DN10 DW23 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat ゛ (Reference) B29K 105: 24 F term (Reference) 4F201 AA45 AG21 AG28 AH13 BA08 BC01 BC02 BC12 BC15 BC17 BD02 BM07 BS02 4F202 AA45 AG21 AG28 AH13 CA09 CB01 CK85 CK87 CK89 4F203 AA45 AG21 AG28 AH13 DA03 DB01 DH19 DN10 DW23
Claims (3)
てバリ部（１０）を一体成形し、離型後に前記製品部
（２）と前記バリ部（１０）とを分離するゴム成形品の
成形方法において、 前記薄肉切断部（９）の一部に前記薄肉切断部（９）の
他の部分（９ａ）より肉厚が薄い薄肉部（９ｂ）を成形
するとともに、前記薄肉部（９ｂ）に対応して前記バリ
部（１０）に突部（１１）を一体成形し、 前記突部（１１）を力点にして前記製品部（２）と前記
バリ部（１０）とを分離することを特徴とするゴム成形
品の成形方法。1. A burr section (10) is integrally formed with a product section (2) through a thin cut section (9), and the product section (2) and the burr section (10) are separated after release. In the method for molding a rubber molded product, a thin portion (9b) having a smaller thickness than another portion (9a) of the thin cut portion (9) is formed on a part of the thin cut portion (9), and the thin portion is formed. A protrusion (11) is integrally formed with the burr part (10) corresponding to the part (9b), and the product part (2) and the burr part (10) are formed with the protrusion (11) as a power point. A method for forming a rubber molded product, which comprises separating.
て、 一体に連なる製品部（２）、薄肉切断部（９）およびバ
リ部（１０）を複数組備えたシート状の成形品（１２）
を成形するとともに前記成形品（１２）をシート状のま
ま成形型（２１）から離型させる工程を有し、 前記成形品（１２）を前記成形型（２１）から離型させ
るときに力を加える方向と、各製品部（２）における薄
肉部（９ｂ）および突部（１１）の配置方向との間に所
定の角度を設定することを特徴とするゴム成形品の成形
方法。2. The method for molding a rubber molded product according to claim 1, wherein the molded product (12) is a sheet-like molded product (12) provided with a plurality of sets of a product part (2), a thin-walled cut part (9), and a burr part (10) which are integrally connected. )
And a step of releasing the molded article (12) from the molding die (21) while keeping the molded article (12) in a sheet-like form, and applying a force when releasing the molded article (12) from the molding die (21). A method for molding a rubber molded product, characterized in that a predetermined angle is set between the direction to be added and the direction in which the thin portions (9b) and the protrusions (11) in each product part (2) are arranged.
用される成形型であって、 薄肉部（９ｂ）を成形する成形部（２６ｂ）が、薄肉切
断部（９）を成形する成形部（２６）の一部に設けられ
るとともに、突部（１１）を成形する成形部（２８）
が、前記薄肉部（９ｂ）を成形する成形部（２６ｂ）に
対応してかつバリ部（１０）を成形する成形部（２７）
に連続してパーティング部に設けられていることを特徴
とする成形型。3. A molding die used for carrying out the molding method according to claim 1 or 2, wherein the molding portion (26b) for molding the thin portion (9b) is for molding the thin cutting portion (9). Forming part (28) which is provided in a part of the part (26) and forms the protruding part (11);
A molding part (27) corresponding to the molding part (26b) for molding the thin part (9b) and molding the burr part (10)
A molding die provided on the parting part continuously from the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25956098A JP3700751B2 (en) | 1998-09-14 | 1998-09-14 | Molding method and mold for rubber molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25956098A JP3700751B2 (en) | 1998-09-14 | 1998-09-14 | Molding method and mold for rubber molded product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000084953A true JP2000084953A (en) | 2000-03-28 |
| JP3700751B2 JP3700751B2 (en) | 2005-09-28 |
Family
ID=17335830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25956098A Expired - Fee Related JP3700751B2 (en) | 1998-09-14 | 1998-09-14 | Molding method and mold for rubber molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3700751B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006103029A (en) * | 2004-10-01 | 2006-04-20 | Nok Corp | Mold |
| JP2016013742A (en) * | 2014-07-01 | 2016-01-28 | Nok株式会社 | Manufacturing method of double vibration-proof structure center bearing support |
| CN108556218A (en) * | 2018-04-28 | 2018-09-21 | 南京金三力高分子科技有限公司 | A kind of curing forming mold and its manufacturing method of the automobile-used rubber one way valve of engineering machinery |
-
1998
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006103029A (en) * | 2004-10-01 | 2006-04-20 | Nok Corp | Mold |
| JP2016013742A (en) * | 2014-07-01 | 2016-01-28 | Nok株式会社 | Manufacturing method of double vibration-proof structure center bearing support |
| CN108556218A (en) * | 2018-04-28 | 2018-09-21 | 南京金三力高分子科技有限公司 | A kind of curing forming mold and its manufacturing method of the automobile-used rubber one way valve of engineering machinery |
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| Publication number | Publication date |
|---|---|
| JP3700751B2 (en) | 2005-09-28 |
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